1st 9 wks Test

Question 1

in the periodic table, the most reactive metals are found

Answer 1

in group 1, the first column on the left

Question 2

which property of bromine could you NOT predict based on the fact that it is a nonmetal in the halogen family

Answer 2

liquid at room temperature

Question 3

in a neutral atom, the number of protons equals the number of

Answer 3

electrons

Question 4

the elements in a row of the periodic table

Answer 4

have properties that change in a pattern

Question 5

the elements in a column of the periodic table

Answer 5

are in the same period

Question 6

what information in the periodic table indicates the number of protons in an atom

Answer 6

the elements atomic number

Question 7

which parts of the atom move around the nucleus

Answer 7

electrons

Question 8

the atomic number of an element is based on

Answer 8

number of protons in its nucleus

Question 9

what is true about transition metals

Answer 9

they include familiar metals such as gold, silver, copper, and nickel

Question 10

the elements that do not ordinarily form compounds are

Answer 10

halogens

Question 11

which particles in atoms have a negative electric charge

Answer 11

electrons

Question 12

fluorine, chlorine, bromine, and iodine are part of the family called

Answer 12

halogens

Question 13

magnesium bromide is an ionic compound with the chemical formula MgBr2 what does the 2 mean

Answer 13

there are 2 bromide ions for every magnesium ion

Question 14

each group in the periodic table has its own characteristic properties based on the number of

Answer 14

protons

Question 15

when an atom loses an electron, it becomes a

Answer 15

negative ion

Question 16

an ionic bond is the attraction between

Answer 16

neutral atoms

Question 17

what is the chemical name for the compound with the formula Na2S

Answer 17

sodium sulfide

Question 18

in what form can an ionic compound conduct electricity

Answer 18

when dissolved in water

Question 19

a chemical bond formed when two atoms share electrons is called a(n)

Answer 19

covalent bond

Question 20

the smallest particle of an element is called a(n)

Answer 20

atom

Question 21

in the chemical formula for an ionic compound, which item is written first

Answer 21

positive ion

Question 22

which particles in an atom are in the nucleus

Answer 22

protons and neutrons

Question 23

electrons involved in bonding between atoms are

Answer 23

valence electrons

Question 24

what is the greatest number of valence electrons an atom can have

Answer 24

8

Question 25

if atoms of a halogen nonmetal (Group 17) gain one electron, the atoms then have

Answer 25

8 valence electrons

Question 26

a chemical equation that shows the same number of each kind of atom on both sides of the equation is said to be

Answer 26

balanced

Question 27

anything that has mass and takes up space

Answer 27

matter

Question 28

CaCo3 represents a chemical

Answer 28

formula

Question 29

a shorter, easier way to show chemical reactions, using symbols instead of words, is called a

Answer 29

chemical equation

Question 30

a bottle of hydrogen peroxide that eventually turns into a bottle of water and oxygen gas is an example of a

Answer 30

decomposition reaction

Question 31

a chemical reaction that absorbs energy in the form of heat is described as

Answer 31

unbalanced

Question 32

the minimum amount of energy that has to be added to start a reaction is the

Answer 32

activation energy

Question 33

the number placed below an element's symbol in a chemical formula is called a

Answer 33

subscript

Question 34

bc atoms are so small

Answer 34

scientists create models to describe them

Question 35

in an atom of fluorine, how many electrons would be found in the 2nd energy level

Answer 35

7

Question 36

in an atom of carbon, how many energy levels will it have

Answer 36

2

Question 37

how many electrons are located on the 3rd energy level of calcium

Answer 37

8

Question 38

the combined force of attraction among water molecules and with the molecules of surrounding materials

Answer 38

capillary action

Question 39

the process by which a gas changes to liquid

Answer 39

condensation

Question 40

the process by which molecules at the surface of a liquid absorb enough energy to change to the gaseous state

Answer 40

evaporation

Question 41

the amount of heat needed to increase the temperature of a certain amount of a substance by 1 degree Celsius

Answer 41

specific heat

Question 42

a substance that dissolves another substance

Answer 42

solution

Question 43

a mixture that forms when one substance dissolves another

Answer 43

solvent

Question 44

form of a substance, including solid, liquid, and gas

Answer 44

state

Question 45

the tightness across the surface of water caused by the polar molecules pulling on each other

Answer 45

surface tension

Question 46

water is made up of _______ bonded together to form molecules

Answer 46

atoms

Question 47

chemical formula for water

Answer 47

H2O

Question 48

a molecule that has electrically charged area is called a(n)

Answer 48

polar molecules

Question 49

how does capillary action allow water to climb up the sides if a straw

Answer 49

the forces of adhesion and hesion working together

Question 50

a mixture that forms when one substance dissolves another is called a(n) __________.

Answer 50

solution

Question 51

the substance that does the dissolving is called a(n) _________

Answer 51

solvent

Question 52

why is water considered a polar substance

Answer 52

bc positive and negative hydrogen ends of on water molecule attract the negative oxygen ends of nearby water molecules

Question 53

which state of water is a allows a fish to remain in a lake when winter temperatures are below 0°C

Answer 53

when the temperature reaches 0 degrees Celsius, The solid ice melts and becomes a liquid wire which allows fish to remain in water

Question 54

what happens to the molecules of water vapor when the temperature of the gas cools to 100°C

Answer 54

at 100°C, liquid water boils in the molecules have enough Energy today scape the liquid and become water vapor

Question 55

why is water often called the "universal solvent"

Answer 55

any substance is dissolved in water because water is polar