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CHEMISTRY 1 Flashcards

(102 cards)

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1
Q

Which of the ff. is not a property of acids?

A

Feel slippery on skin

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2
Q

The discovery of radioactivity further confirms the existence of subatomic particles. Who discovered radioactivity?

A

Henri Becquerel

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3
Q

Element used as electric power source for pacemakers and artificial hearts

A

Promethium

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4
Q

Halogens belong to what group?

A

Group VIIA

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5
Q

Rows in periodic tables are called _______________

A

Periods

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6
Q

When the elements are arranged in the order of increasing atomic number, elements with similar properties appear at periodic intervals

A

Periodic Law

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7
Q

The properties of a material that also change when the amount of substance changes is called ________ properties.

A

extensive

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8
Q

Group in P.T. that are the noble gases.

A

Group O or VIIIA

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9
Q

“Identity number” of an atom

A

Atomic Number

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10
Q

Noble gas that has the smallest atomic number

A

Helium

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11
Q

How are substances classified?

A

Elements or Compound

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12
Q

Caustic soda is used in making soap, textiles and paper. What is the other term for it?

A

Sodium Hydroxide

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13
Q

3 States of Matter

A

Solid, Liquid, Gas

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14
Q

A material is ________ if its composition and properties are uniform throughout

A

Homogenous

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15
Q

A very fine particle of soil when mixed to water will form a cloudy mixture

A

Colloid

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16
Q

Elements that have properties intermediate between metals and nonmetals

A

Metalloids

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17
Q

When two or more elements form more than one compound, the ratio of the masses of one element that combine with a given mass of another element in the different compounds is a ratio of small whole numbers

A

Law of multiple proportion

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18
Q

Elements in Group IIA in periodic table

A

Alkaline Earth Metals

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19
Q

Substance that cannot be broken into simpler substance

A

Element

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20
Q

Atomic Number of Carbon

A

6

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21
Q

Vinegar is a solution of water and what kind of acid?

A

Acetic Acid

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22
Q

Occurs when a substance changes in appearance without changing its composition.

A

Physical Change

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23
Q

Charge of an electron in coulomb

A

-1.602176462 x 10^-19

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24
Q

Classification of elements

A

Metals, Nonmetals, Metalloid

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25
Which of the ff. is NOT an extensive property of material?
Density
26
Charge of an electron in charge unit
1 -
27
Mass of an electron in amu
5.485799 x 10^-4
28
Elements with similar properties are placed in columns of the periodic table. These columns are called _______
Groups or Families
29
Another term for chemical change
Chemical Reaction
30
Most unique element in periodic table
Carbon
31
Anything that occupies space and has mass
Matter
32
Most abundant element in terms of number of atoms
Oxygen
33
All forms of matter are composed of the same building blocks called
atoms
34
Mass of a proton in amu
1.0072765
35
Most abundant element in the human body
Oxygen
36
Particles of sugar dispersed in water are so small that a clear homogenous mixture is formed
Solution
37
Element used as a coating for iron to make galvanized iron a corrosion-resistant material.
Zinc
38
Element used in making lasers.
Neodymium
39
How does John Joseph Thomson call his model of the atom?
Plum-pudding model
40
Which of the ff. is not a property of metals?
Metals are neither malleable or ductile
41
Occurs when a substance is transformed into another substance with a totally different composition and properties.
Chemical Change
42
The properties of material that do not change when the amount of substance changes are called _____ properties.
intensive
43
Atoms of the same element which have different masses.
Isotopes
44
Discovered electron
Joseph John Thomson
45
Charge of a proton in charge unit
1+
46
Acid added to carbonated drinks to produce a tart test
Phosphoric Acid
47
Substance that cannot be broken into simpler substance
Element
48
Alkali metal that is usually used for x-ray apparatus because of its ability to allow x-rays to pass through with minimum absorption
Beryllium
49
Charge of a proton in coulombs
+1.602176462 x 10^-19
50
Second most abundant element in the human body.
Carbon
51
Common unit used to indicate the mass of a particle
Atomic Mass Unit (amu)
52
First person to propose atoms have weight
John Dalton
53
Chalcogens are what group in P.T.
Group VIA
54
Which of the ff. is not a property of bases?
Dissolve metals producing various salts and hydrogen gas
55
Which of the ff. is NOT a noble gas?
Antimony
56
Atomic Number of Oxygen
8
57
Atomic number of Germanium
32
58
The protons and neutrons are not considered fundamental particles because they consist of a smaller particles called _________
Quarks
59
Property of metals that makes them reflect the light that strikes their surfaces, making them appear shiny
Luster
60
Who discovered Proton
Ernest Rutherford
61
The masses of elements in a pure compound are always in the same proportion
Law of definite proportion
62
Who revised the atomic theory by replacing the hard, indestructible spheres imagined by Dalton and proposed the "raisin bread model" of the atom?
Joseph john Thomson
63
Alkaline earth metal that has the smallest atomic number.
Beryllium
64
Discovered Neutron
James Chadwick
65
Property that allows metal to be rolled without breaking
Malleability
66
Carbon Group is in what group in P.T.
Group IVA
67
First person to propose atoms have weight.
John Dalton
68
Unit for a charge of a particle
Charge Unit
69
Unit for a charge of a particle
Charge Unit
70
Result from the combination, in definite proportion of mass, two or more elements
Compound
71
Atoms of specific isotopes
Nuclide
72
Mass of an electron in gram.
9.109387 x 10^-31
73
Atom come from Greek word "atomos" which means
indivisible
74
Who formulated the atomic theory?
John Dalton
75
Nitrogen Group is what group in P.T.
Group VA
76
Used for manufacturing of fireworks and explosives
Potassium Perchlorate
77
Mixture of soil and water is an example of
Suspension
78
The sum of the number of protons and neutrons in the nucleus of an atom
Mass number
79
Boron Group is what group in P.T.
Group IIIA
80
Classification of mixtures
Suspension, Colloids, Solutions
81
Mass of a neutron in amu
1.00866
82
The number of _____ in atom defines what element the atom is.
proton
83
If electrons are removed from or added to a neutral atom, a charged particle of the same element.
ion
84
Positively charged particle of an atom
Proton
85
A material is said to be _____ if its composition and properties are not uniform throughout
Heterogenous
86
Two chemists credited for discovery of periodic law
Julius Lothar Meyer and Demitri Ivanovich Mendeleev
87
An acid can react with base to produce a
Salt
88
All alkalin metals will tarnish in air except
Beryllium
89
Table salt or sodium chloride may be formed by the reaction of:
Hydrochloric Acid and Sodium Hydroxide
90
Germanium and Silicon are commonly used for semiconductors, they belong to ________.
Carbon Group
91
The atomic number of an element
the number of protons in the nucleus
92
Mass of a neutron in grams
1.67496 x 10^-27
93
Particle of an atom that has no electric charge
Neutron
94
Which of the ff. is NOT an intensive property of a material?
Surface Area
95
Mass of a proton in gram
1.672623 x 10^-27
96
The number of ________ in an atom defines the isotopes of an element
Neutrons
97
Elements in Group 1A in periodic table
Alkali Metals
98
Which of the ff. is NOT a metalloid
Magnesium
99
A negatively charged ion which results when an electron is added to an atom
Anion
100
Compounds are mostly classified as
Acids and Bases
101
A positively charged ion which results when an electron is removed from an atom.
Cation
102
Mass of a proton in gram
1.672623 x 10^-27

CHEMISTRY (RCARDS) (3 decks)

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