Science-- 1st semester finals Flashcards
(254 cards)
1
Q
How are science and technology related?
A
Advances in science may lead to advances in technology and vice versa.
2
Q
What is the metric unit for mass?
A
b. Kilograms
3
Q
What are the building blocks of matter?
A
b. Atoms
4
Q
What happens when the data in an investigation do not support the original hypothesis?
A
c. The hypothesis will be revised.
5
Q
Which of the following statements is true about scientific theories?
A
b. Scientific theories are never proven
6
Q
Why are scientific models important?
A
b. They help visualize things that are very complex, very large, or very small.
7
Q
Which of the following is an example of a safe laboratory procedre?
A
a. tying back long hair and loose clothing.
8
Q
Which of the following temperature scales does NOT have any negative temperature?
A
a. Kelvin
9
Q
In the metric system, 1cm3 is equal to one?
A
b. millimeter
10
Q
Which of the following clocks offers the most precision?
A
d. a clock that measures time to the nearest tenth of a second
11
Q
60F is equal to__K?
A
d. 289
12
Q
The type of graph used to show how a part of something relates to the whole is a ?
A
a. circle graph
13
Q
How do scientists who speak different languages make their data understandable to one another?
A
b. They all use SI.
14
Q
An educated guess would define which of the following?- scientific law, conclusion, theory, hypothesis
A
d. hypothesis
15
Q
If the relationship between the manipulated variable and the responding variable is a direct proportion, what will a line graph of this relationship look like?- straight line, curved line, jagged line, none of these
A
a. straight line
16
Q
What is a system of knowledge and the methods used to find that knowledge?
A
b. science
17
Q
Which of the following is NOT a branch of natural science?- life science, Earth and space science, physical science, social science
A
d social science
18
Q
Volume is equal to?
A
c. length x width x height
19
Q
In which step of the scientific metod is info obtained through the senses?
A
b. making observations
20
Q
What is a statement that summarizes a pattern found in nature?- scientific law, a fact, a scientific theory, a hypothesis
A
a. scientific law
21
Q
What is a physical or mental representation of an object or an event?- theory, hypothesis, a model, a scientific law
A
c. a model
22
Q
What is the most important safety rule?- never work with chemicals, always use unbreakable glassware =, always follow teavhers instructions and textbook directions exactly, never do experiments with flames or hot objects
A
c. always follow teachers instructions and textbook directions exactly
23
Q
How is 0.00025 written in scientific notatition?
A
d. 2.5 x 10^4
24
Q
Which of the following is equal to 1 centimeter?- 100m, 1/10 of a mm, 10mm, 100mm
A
c. 10mm
25
Timers at a swim meet used 4 different clocks to time an event. Which is most precise?- 55sec, 55.0sec, 55.2sec, 55.25sec
d. 55.25 seconds
26
On the Celcius scale, at what temp. does water boil?- 0, 212, 100, 32
c. 100
27
What is the relationship in which the ratio of the manipulated variable and the responding variableis constant?- inverse prop, direct prop, slope, interdependent
b. direct proportion
28
How do scientists communicate the results of investigation?- publishing articles in scientific journals, giving talks at conf., exchanging emails, all of the above
d. all of the above
29
What is the metric unit for volume/- pounds, kilograms, liters, meters
c. liters
30
What is the metric unit for temp.? - Celcius, Farenheit, Kelvin, Zanger
c. Kelvin
31
Volume is defined as?- amount of matter in an object, length of an object, amount of space taken up, pull of gravity on an object/
c. amount of space taken up
32
Boiling point of water on the Kelvin temp. scale?- 0, 273, 373, 100
c. 373
33
Density is equal to____- mass/volume, rise/run, lxwxh, l x w
a. mass/volume
34
The explanation of the pattern in nature is provided by__- scientific law, a fact, a scientific theory, a hypothesis
c. a scientific theory
35
When a scientist measures water 1mL=___- gram, m^3,pound, liter
gram
36
TEST 2
Study Guide
36
A mixture can be classified as a solution, suspension, or a colloid based on the- a. #of particles it contains, b. size of its particles, c color of its particles, d. Density of its particles
B. size of its particles
37
You are about to open a container if soy milk, but notice that there are instructions to "shake well" before serving, the soy milk is most likely a- a. Solution, b. pure substance, c. Colloid , d. Suspension
D. Suspension
38
Method that can be used to desperate parts of a liquid mixture when the entire mixture can pass through a filter?- a. Filtration b. distillation c. Straining d. Screening
B. distillation
39
When a physical change in a sample occurs, which of the following does not change?- a. Shape b. temp. c. Volume d. Composition
D. Composition
40
A substance that has high reactivity- a. Easily combines chemically with other substances, b. burns in the presence of water, c. Displaces dissolved oxygen,d. Has a high boiling point
A. Easily combines chemically with other substances
41
Which of the following is a chemical change? a. Ice melting, b. ice being carved, c. Water boiling, d. Water breaking down into hydrogen and oxygen
D. Water breaking down into hydrogen and oxygen
42
Which of the following is a clue of a chemical change? A. Iron changes color when heated, b.gas bubbles form in boing water, c. Balls of wax form when melted wax is poured into ice water, d. Gas forms when vinegar and baking soda are mixed
D. Gas forms when vinegar and baking soda are mixed
43
The units used to measure density are--a. Cm^3, b. mm, newtons/kilograms, d. Grams/mm
D. Grams/mm
44
A unit of mass is the-- a. Pound, b. newton, c. Liter, d. Gram
D. Gram
45
Which of the following are pure substances? A. Solutions, b. compounds, c homogeneous mixtures, d. Colloids
B. compounds
46
Volume is NOT measured in--a. Grams, b. liters , c. Cm3, d. Mm
A. Grams
47
A substance made up of one kind of atom is a-- a. Compound, b. homogeneous mixture, c. Element, d. Solution
C. Element
48
Symbol for aluminum?
Al
49
Symbol for gold?
Au
50
Formula for density?
B. D= m/v
51
Objects sink in water because they... A. Are heavier than water, b. more dense than water, c. Have more inertia than water, d. Are colder than water
B. are mores dense than water
52
If a material contains three elements joined in a fixed proportion, it is a.... A. Mixture, b. solution, c. Atom, d. Compound
D. Compound
53
Wate is a compound because they- a. Can be broken down into simpler substances, b. always has two hydrogen atoms for each oxygen atom, c is made of water atoms joined together, d both A and B
D. Both A and B
54
The density of water is-- a. 1mL/g, b. 1 g/L, c. 1 g/mL, d. 1 kg/mL
C. 1 g/mL
55
As 2ml of lead has a mass of 22.6 g, the density of lead is--a. 11.3g/mL, b. 20.6 g/mL, c. 24.6 g/mL, d. 45.2 g/mL
A. 11.3 g/mL
56
Which of the following is a mixture?-- a. Carbon dioxide, b. silicon, c. Silicon dioxide, d. Sand
D. Sand
57
Volume is?-- a. The amount of matter in an object, b. the amount of space an object takes up, c. The gravitational pull on an object, d. An object =s resistance to a change in motion?
B. the amount of space an object takes up
58
Object X has a mass of 1g and a volume of 1 mL. Object Y is the same substance as X, but has a mass of 5g. Which object has a greater density?-- a. X, b. Y, c. X and Y have the same density, d. Cannot be answered with provided info
C. X and Y have the same density
59
Which of the following is a characteristic of a mixture?-- a. Has varying properties, b. has a fixed composition, c. Contains only pure substances, d. Both A and B
A. Has varying properties
60
The density of an object with a mass of 25g and a volume of 5mL is?--a. 5g/mL, b. 20g/mL, c. 30 g/mL, d. 125g/mL
A. 5g/mL
61
A mixture that appears to contain only one substance is a-- a. Homogeneous mixture, b. heterogeneous mixture, c. Compound, d. Element
A. Homogeneous mixture
62
Which of the following is malleable?-- a. Glass, b. pottery, c. Ice, d. Gold
D. Gold
63
Which of the following has the highest viscosity? -- a. Corn syrup, b. milk, c. Water, d. Orange juice
A. Corn syrup
64
Among the following, the unit that is least closely related is the?-- a. Mm, b. cm^3, c. Liter, d. Gram
D. Gram
65
A substance has a melting point of 0C and a boiling point of 100C. The substance is most likely?-- a. Water, b. hydrogen, c. Gold, d. Table salt
A. Water
66
Which of the following is NOT a clue that a chemical change has occurred?-- a. Change in color, b. production of a gas, c. Formation of a precipitate, d. Change in shape
D. Change in shape
67
Ice floats because it is___dense than water?-- a. Less, b. more, c. 10times, d. 2times as
A. Less
68
In order to make an object less dense w/o changing its mass, a person would ___ the volume.-- a. Increase, b. decrease, c. Not change, d. Can't be determined
A. Increase
69
In order to make an object more dense w/o changing its mass, a person would__ the volume.-- a. Increase, b. decrease, c. Not change, d. Can't be determined
B. decrease
70
In order to make an object less dense w/o changing its volume, a person would__ the mass?-- a. Increase, b. decade, c. Not change, d. Can't be determined
B. decrease
71
In order to make an object more dense w/o changing its volume, a person would__the mass.-- a. Increase, b. decrease, c.not change, d. Can't be determined
A.increase
72
A material that is malleable and conducts electricity is most likely -- a. Wood, b. ice, c. A metal, d. Motor oil
C. A metal
73
Filtration can be used to separate mixtures based on?-- a. Their boiling points, b. their densities, c. Melting points, d. Size of their particles
D. Size of their particles
74
Which of the following is a physical change?-- a. Sawing wood in half, b. burning wood, c. Rust forming on iron, d. Copper roof from red to green
A. Sawing wood in half
75
Flammability is a materials ability to burn in the presence of--- a. Hydrogen, b. nitrogen, c. Oxygen, d. Carbon dioxide
C. Oxygen
76
Air is an example of a(an)?-- a. Atom, b. molecule, c. Compound, d. Mixture
D. Mixture
77
The smallest piece of an element with all the properties of an element is a?-- a. Atom, b. molecule, c. Compound, d. Mixture
A. Atom
78
The smallest piece of gold is a?-- a. Atom, b. molecule, c. Compound, d. Mixture
A. Atom
79
The smallest piece of water is a?--a. Atom, b. molecule, c. Compound, d. Mixture
B. molecule
80
Al
Aluminum
81
Ba
Barium
82
Bi
Bismuth
83
B
Boron
84
Br
Bromine
85
Ca
Calcium
86
C
Carbon
87
Cl
Chlorine
88
Cr
Chromium
89
Co
Cobalt
90
Cu
Copper
91
F
Fluorine
92
Au
Gold
93
He
Helium
94
H
Hydrogen
95
I
Iodine
96
Fe
Iron
97
Pb
Lead
98
Li
Lithium
99
Mg
Magnesium
100
Mn
Manganese
101
Hg
Mercury
102
Ne
Neon
103
Ni
Nickel
104
N
Nitrogen
105
O
Oxygen
106
P
Phosphorus
107
Pt
Platinum
108
K
Potassium
109
Si
Silicon
110
Ag
Silver
111
Na
Sodium
112
S
Sulfur
113
Sn
Tin
114
W
Tungsten
115
Zn
Zinc
116
T/F-- solids have no definite shape and no definite volume
F
117
T/F perspiration cools the body by means of sublimation
F
118
T/F boyles law describes the behavior of gases
T
119
T/F the change of a liquid to a gas is called vaporization
T
120
T/F matter can exist in only 3phases- solid, liquid, and gas.
F
121
T/F an amorphous solid can be thought of as a slow moving liquid.
T
122
T/F according to Charles law, the volume of a fixed amount of gas varies inversely with the temp of gas
F
123
T/F the sun contains matter in the plasma phase
T
124
T/F the change of a substance from a solid to liquid is called freezing
F
125
T/F the temp must be constant for boyles law to be used
T
126
According to boyles law, if the volume of a gas is decreased, the-- a. Particle collisions within the gas will increase, b. previous but decrease, c. Pressure of the gas will decrease, d. Temp of the gas will increase
A. Particle collisions within the gas will increase
127
The phase change that is the reverse of condensation is-- a. Freezing, b. sublimation, c. Vaporization, d. Melting
C. Vaporization
128
Forces of attraction limit the motion of particles most in-- a. A solid, b. a liquid, c. A gas, d. Both b and c
A. A solid
129
The change of a substance from a gas to a liquid is called-- a. Freezing, b. melting, c. Sublimation, d. Vaporization
A. Freezing
130
The change of a liquid to a solid is called-- a. Freezing, b. melting, c. Sublimation, d. Vaporization
.a. Freezing
131
When particles in a closed container are heated, they-- a. Lose energy, b. lose volume, c. Move closer together, d. Move faster
D. Move faster
132
When substances go directly from the solid phase to the gas phase, the phase change is called-- a. Sublimation, b. condensation, c. Evaporation, d. Vaporization
A. Sublimation
133
Which of the following phase changes is an exothermic change-- a. Sublimation, b. deposition, c. Vaporization, d. Melting
B. deposition
134
Solids that lose their shape under certain conditions a-- a. Rigidly arranged. B. crystalline, c. In a regular, repeating pattern, d. Amorphous
D. Amorphous
135
Which of the following will cause a decrease in gas pressure in a closed container-- a. Lowering the temp, b. reducing the volume, c. Adding more gas, d. Both a and b
A. Lowering the temp
136
99% of all the matter that can be observed in the universe exists as-- a. Gases, b. plasmas, c. Liquids, d. Solids
B. plasmas
137
A proportion is inverse when-- a. One factor decreases as the other decreases, b. one factor increases as the other decreases, c. One factor increases as the increases, d. No relationship exists between the changes in the factors
B. one factor increases as the other decreases
138
An example of a substance that sublimes is-- a. Ice cream, b. dew, c. Dry ice, d. Ice water
C. Dry ice
139
The phase change in which a substance changes from a gas directly to a solid-- a. Condensation, b. vaporization, c. Deposition, d. Sublimation
C. Deposition
140
If you move a substance from one container to another and it's volume changes, the substance is a -- a. Solid, b. liquid, c. Gas, d. Solution
C. Gas
141
Raising the temp of a gas will increase its pressure IF the volume of the gas-- a. And the # of particles are increased, b. is increased, but the # of particles is constant, c. And the # of particles are constant, d. Is constant, but the # of particles is increased
C. And the # of particles is constant
142
During a phase change, the temp of a substance-- a. Increases, b. decreases, c. Remains the same, d. Increases or decreases
C. Remains the same
143
The heat of fusion for h2o is the amount of energy needed for h2o to-- a. Freeze, b. boil, c. Melt, d. Evaporate
C. Melt
144
An example of an amorphous solid is-- a. Glass, b. table salt, c. Snowflake, d. Solid carbon dioxide
A. Glass
145
A regular, repeating arrangement of particles is called-- a. Plasma, b. crystalline solid, c. Phase, d. Sublimation
B. crystalline solid
146
According to Charles law-- a. Pressure of a gas increases if volume decreases, b. pressure of a gas decreases if volume decreases, c. Volume of a gas increases if temp increases, d. Volume of a gas decreases if temp increases
C. Volume of a gas increases if temp increases
147
A vey high energy phase of matter not found naturally on earth is-- a. Crystalline solid, b. amorphous solid, c. Flammable gas, d. Plasma
D. Plasma
148
Dry ice is solid-- a. Water, b. oxygen, c. Carbon monoxide, d. Carbon dioxide
D. Carbon dioxide
149
The heat of vaporization for h2o is the amount of energy needed for h2o to-- a. Freeze, b. boil, c. Melt, d. Evaporate
D. Evaporate
150
Melting of ice is an example of a-- a. Chemical property, b. Physical change c. Chemical change, d. Density change
B. Physical change
151
Which of the following statements about ice melting is true-- a. Energy flows from the ice to its surroundings, b. water molecules move from their fixed position, c. Water molecules lose energy, d. The temp of the ice increases as it melts
B. Water molecules move from their fixed position
152
An example of a crystalline solid-- a. Candle wax, b. glass, c.table salt, d. Tar
C. Table salt
153
Which of the following has a definite volume, but not a definite shape-- a. Solid, b. liquid, c. Gas, d. Plasma
B. liquid
154
When gas leaves the surface of a liquid, the liquid-- a. Evaporates, b. boils, c. Melts, d. Condenses
A. Evaporates
155
The gas laws describe the behavior of gases with changes in pressure, volume, and-- a. Temp, b. density, c. Shape, d. Size
A. Temp
156
Boyles law states that the volume of gas varies__ with the pressure of the gas-- a. Inversely, b. directly, c. Somewhat, d. Evenly
A. Inversely
157
Which phase of matter contains the greatest amount of energy-- a. Plasma, b. gas, c. Liquid, d. Solid
A. Plasma
158
Charles law states that the volume of a gas varies __ with the temperature of the gas-- a. Inversely, b. directly, c. Somewhat, d. Evenly
B. directly
159
When a substance condensates, the substance will___energy-- a. Burn, b. produce, c. Absorb, d. Release
D. Release
160
What happens to the volume of a gas when the pressure on the outside of a balloon is tripled and the temp is constant?-- a. Triples, b. decreases to 1/3 the size, c. Remains the same, d. None of the above
B. decreases to 1/3 the size
161
What happens to the volume of a gas when the pressure on the outside of a balloon is decreased by a factor of five and the temp remains the same? -- a. Increases by5x, decreases by 1/5, c. Remains the same, d. None of the above
.a. Increases by 5x
162
What happens to the volume of a gas when the temp is halved and the pressure is constant?-- a. Doubles, b. decreases by 1/2, c. Remains the same, d. None of the above
B. decreases by 1/2
163
What happens to the volume of a gas when the pressure on the outside of a balloon is halved and the temp is halved-- a. A. Doubles, b. decreases by 1/2 ,c. Remains the same, d. Increases by 4x
C. Remains the same
164
What happens to the volume of a gas when the pressure on the outside of a balloon is halved and the temp is constant-- a. Doubles, b. decreases by 1/2, c. Remains the same, d. None of the above
A. Doubles
165
T/F-- the nucleus of an atom is positively charged
T
166
T/F. The ruler ford model of the atom states that an atom consists of a nucleus and empty space outside the nucleus
T
167
T/F. The mass of the proton is two times greater than that of a neutron
F
168
T/F. A neutral atom that contains 11 protons also contains 11 electrons
T
169
T/F. When electrons gain additional energy, they move farther away from the nucleus
T
170
T/F. Neutrons contribute to an atoms atomic number but not to it's mass number
F
171
T/F. The chemical properties of an element depend on the number and arrangement of the protons in its atoms
F
172
T/F isotopes have different atomic numbers, but the same mass number
F
173
T/F Aristotle stated the four elements were earth, water, air, and fire
T
174
T/F. The nucleus makes up about 99.9% of the mass of the atom
T
175
The smallest piece of matter was named "atom" by-- a. Socrates, b. dalton, c. Democritus, d. Hippocrates
C. Democritus
176
Which statement about subatomic particles is NOT true-- a. Protons and neutrons have almost the same mass, b. protons and electrons have opposite charges, c. Unlike protons and electrons, neutrons have no charge, d. Protons and neutrons have the same charge
D. Protons and neutrons have the same charge
177
What can you assume has happened if an electron moves to a higher energy level-- a. The atom has become more stable, b. the electron has lost energy, c. The electron has gained energy, d. The atom has lost an electron
C. The electron has gained energy
178
The electron was discovered by-- a. Dalton, b. Thomson,c. Rutherford, d. Bohr
B. Thomson
179
In Rutherfords experiment -- think pp positive particles
C. Most positive particles fired at gold foil passed right thought the foil
180
As a result of his experiment, Rutherford proposed that an atom has-- a. A dense,+ charged nucleus , b. dense, - charged nucleus, c. Neutral nucleus surrounded by negatively charged electrons, d. A neutral nucleus surrounded by positively charged particles
A. A dense, positively charged nucleus
181
According to Rutherfords model of the atom, electrons are held in an atom-- a. In the nucleus, b. by the attraction of the positively charged nucleus,c. Scattered among positive charges, d. By the attraction of the negatively charged nucleus
B. by the attraction of the positively charged nucleus
182
Bohrs atomic model placed the electrons-- a. In the nucleus, b. in definite orbits around the nucleus, c. In no definite position, d. Scattered among the stitch charges
B. in definite orbits around the nucleus
183
According to Thomsons atomic model, --a. Atoms consist of only - electrical charges,b. atoms consist of only + electrical charges, c. Atoms are either electrically + or -, d. Atoms consist of - charged electrons scattered among + charges
D. Atoms consist of - charged electrons scattered among + charges
184
Which is not a characteristic of the modern atomic model-- a. Electrons surround the nucleus, b. an atom is neutral, c. The nucleus takes up most of the atom, d. The nucleus is positively charged
C. The nucleus takes up most of the atom
185
Almost all of the mass of an atom is found-- a. Outside the nucleus, b. in the electron cloud, c. In the energy levels, d. In the nucleus
D. In the nucleus
186
The nucleus of an atom contains-- a. Protons and electrons, b. protons and neutrons, c. Electrons and neutrons, d. Only neutrons
B. protons and neutrons
187
The atomic # of an element indicates the-- a. Sum of protons plus neutrons, b. sum of protons plus electrons, c. Number of protons, d. Number of neutrons
C. Number of protons
188
Which statement about subatomic particles is true-- a. Protons, neutrons, and electrons all have the same mass, b. unlike protons or neutrons, electrons have no mass, c. Neutrons have no charge and no mass, d. An electron has far less mass than either a proton or neutron
D. An electron has far less mass than either a proton or neutron
189
The atomic # of hydrogen is 1 and mass number is 1. It's nucleus must contain-- a. 1proton and 1neutron, b. 1 proton only, c. 1 electron only, d. 1 neutron only
1 proton only
190
Atoms of the same element may differ in their numbers of-- a. Protons, b. electrons, c. Protons plus electrons, d. Neutrons
D. Neutrons
191
An element has an atomic # of4 and a mass # of 9. The # of neutrons in the nucleus of an atom in this element is-- a. 2, b.3 , c. 4, d. 5
D.5
192
If an isotope of sulfur has 16 protons, 17 neutrons, and 16 electrons, it's mass number is -- a. 16, b. 17, c. 33, d. 49
C. 33
193
An atom of carbon whose mass number is 14 differs from an atom of carbon whose mass number is 12 in that it has-- a. 2 more protons, b. 2 more electrons, c. 2 more neutrons, d. 1 more proton and 1 more neutron
C. 2 more neutrons
194
The level of an electron in an electron cloud-- a. Is missile to determine, b. depends on how much energy the electron has, c. Depends on the charge of the electron, d. Depends on the mass of the electron
B. depends on how much energy the electron has
195
The word atom comes from the Greek word " atomos" meaning-- a. Matter, b. indivisible, c. Mass, d. Volume
B. indivisible
196
All neutrons-- a. Are electrically neutral, b. have a mass equal to an electron, c. Are electrically positive, d. Are located outside the nucleus
A. Are electrically neutral
197
Which statement is true about oxygen 16 and oxygen 18-- a. They do not have the same number of protons, b. their atoms have an identical mass, c. They are isotopes of oxygen, d. They have the same mass number
C. They are isotopes of oxygen
198
Within the electron cloud, electrons are arranged in-- a. No particular order, b. groups of 4, c. Energy levels, d. Groups of 6
C. Energy levels
199
What is evidence gathered without actually seeing or touching the object?
Indirect evidence
200
Democritus concluded that matter-- a. Could be divided into smaller pieces forever, b. could not be divided into smaller pieces forever, c. Consists of,protons, neutrons, and electrons, d. Is positively charged
B. could not be divided into smaller pieces forever
201
The maximum capacity of the 3rd energy level is-- a. 9, b. 18, c. 32, d. 36
B. 18
202
Which scientist stated that the nucleus had a positive charge? -- a. Thomson, b. Bohr, c. Rutherford, d. Democritus
C. Rutherford
203
The formula for calculating the maximum capacity of an electron energy level is
2n^2
204
T/F the properties of the elements in a period are very similar
F
205
T/F most of the elements of the periodic table exist naturally as solids
T
206
T/F no two elements have the same atomic number
T
207
T/F the alkali metals are more active than the alkaline earth metals
T
208
T/F metalloids are better conductors of heat and electricity than are metals
F
209
T/F moving from element to element across a period, an additional electron in the same energy level is added to each atom (exclude the transition metals)
T
210
T/F nonmetals have relatively high melting points
F
211
T/F the noble gases are more active than the halogens.
F
212
T/F the noble gases will combine with other elements
F
213
T/F silicon is the 3rd abundant element in the earths crust
F
214
In attempting to group elements, Mendeleev used their-- a. Physical properties only, b. chemical properties only, c. Physical and chemical properties, d.melting point only
C. Physical and chemical properties
215
Mendeleevs periodic table arranged all the known elements in order of-- a. Increasing atomic mass, b. decreasing atomic mass, c. Increasing valence, d. Decreasing valence
.a. Increasing atomic mass
216
When Mendeleev arranged the elements in rows of seven-- a. All elements in a row had the same valence, b. all elements in a column had the same valence, c. All elements in a row had similar physical and chemical properties, d. All elements in a row had the same valence and similar chemical and physical properties
B. all elements in a column had the same valence
217
Two highly reactive elements in period 4 are the metal potassium and the-- a. Metalloids arsenic, b. nonmetal selenium, c. Nonmetal bromine, d. Nonmetal krypton
C. Nonmetal bromine
218
Which of the following occurs in a regular, repeating pattern in Mendeleevs table?-- a. Atomic mass, b. atomic number, c. Size of the atoms, d. Chemical properties
D. Chemical properties
219
Mendeleevs original periodic table of the elements contained many missing elements. Using his periodic table, he was able to-- a. Correctly predict the properties of the missing elements, b. find the missing elements, c. Form the missing elements as a result of chemical reactions, d. Change the location of the missing elements so there would be no blank spaces
A. Correctly predict the properties of the missing elements
220
The modern periodic tableau states that the physical and chemical properties of elements are periodic functions of their-- a. Atomic mass, b. atomic number, c. Phase, d. Energy content
B. atomic number
221
The elements of the modern periodic table are arranged in order of increasing-- a. Chemical activity, b. variety of properties, c. Atomic mass, d. Atomic number
D. Atomic number
222
Elements in the same family of the periodic table -- a. Have similar properties, b. have identical properties, c. Have unrelated properties, d. Always occur in the same phase
A. Have similar properties
223
The most abundant element in the atmosphere is-- a. Oxygen, b. silicon, c. Aluminum, d. Nitrogen, e. helium
D. Nitrogen
224
Elements on the left side of the periodic table tend to be-- a. Inactive solids, b. active solids, c. Inactive gases, d. Active gases
B. active solids
225
Elements on the far right side of the periodic table-- are a. Inactive solids, b. active solids, c. Inactive gases, d. Active gases
C. Inactive gases
226
The most abundant element in earths crust is-- a. Iron, b. silicon, c. Aluminum, d. Oxygen, e. sand
D. Oxygen
227
Which is not a characteristic of a metal -- a. Good conductor of heat and electricity, b. ductile, c. Malleable, d. Found on the far right side of the periodic table
D. Found on the far right side of the periodic table
228
Most of the elements on the periodic table are-- a. Nonmetals, b. metals, c. Rare-earth elements, d. Liquids
B. metals
229
Which of the following is a metalloid?-- a. Sodium, b. copper,
C. Silicon, d. Iron
C. Silicon
230
Moving left to right across a period, the number of valence electrons of the atoms (exclude transition metals)-- a. Increases steadily, b. decreases steadily, c. Increases and then decreases, d. Remains the same
A. Increases steadily
231
In chemical combinations, nonmetals tend to-- a. Lose electrons, b. gain electrons, c. Gain, lose, or share 1electron, d. Gain, lose , or share 4 electrons
B. gain electrons
232
Most of the elements that have 5,6,7 or 8 electrons in their outermost energy level are-- a. Metals, b. nonmetals, c. Metalloids, d. Alloys
B. nonmetals
233
Nonmetals-- a. Are ductile and malleable, b. generally have high densities, c. Are good conductors of heat and electricity, d. Are brittle and have little or no luster
D. Are brittle and have little or no luster
234
Alkali metals are always found in nature combined with other elements because they--a. Are very inactive elements, b, dissolve in water, c. Are very active elements, d. Have only a few of the properties of metals
C. Are very active elements
235
To keep them from reacting, some highly reactive elements are stored in-- a. Water, b. pure oxygen, c. Liquid mercury, d. Argon
D. Argon
236
Are sodium, chromium, and copper all metals?
Yes
237
Which chemical group includes elements found in nature as solids, liquids, and gases-- a. Alkali metals, b. alkaline earth metals, c. Halogens, d. Noble gases
C. Halogens
238
The noble gases are inactive because-- a. They are nonmetals, b. their outermost energy levels are complete, c. They all have 6 valance electrons, d. They are all low density gases
B. their outermost energy levels are complete
239
Which is true for all members of the halogen family?-- a. They are all metals, b. they are very inactive, c. They may be found free or chemically combined in nature, d. They have 7 valence electrons
D, they have 7 valence electrons
240
Potassium is in which category?-- a. Alkali metals, b. alkaline earth metals, c. Halogens, d. Noble ases, e. transition metals
A. Alkali metals
241
Chlorines category-- a. Alkali, alkaline earth, halogens, noble gases, transition metals
C. Halogens
242
The last element on the periodic table that occurs naturally is__. Any element beyond this is manmade
A. Uranium
243
Argons category-- a. Alkai , b. alkaline earth, c. Halogens, d. Noble gases, e. transition meals
D. Noble gases
244
Calciums category. A. Alkali, b.alkaline earth, c. halogens, d. Noble gases, e. transition metals
D. Noble gases
245
Irons category-- a. Alkali, alkaline earth, c. Halogens, d. Noble gases, e. transition metals
E. transition metals
246
How many electron shells does sodium possess? A. 1, b.2 c3, d4, e5
C. 3
247
How many valence electrons does boron possess? A1, b2, c3, d4, e5
C. 3
248
Fluorine is __ than neon? --a. More active, b. less active
A. More active
249
Potassium is __ than calcium?-- a. More active, b. less active
A. More active
250
What is the category that is based upon the number of electron shells-- a. Period, b. groups, c. Alkali, d. Transition, e. radioactive
A. Periods
251
How many valence electrons does mg possess? -- a. 1,2,3,4,5
B. 2
252
What is the category based upon the number of valence electrons?--a. Periods, b. groups, c. Alkali, d. Transition, e. radioactive
B. groups
253
Sodium will -- a. React with water violently, b. react with the noble gases, c. React with alkaline earth metals, d. React with transition metals
A. React with water violently
