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Chemistry revision

Total questions: 91

Worksheet time: 1hrs 18mins

Name
Class
Date
1.

Which of the following statements describes a chemical property?

a)

An iron bar rust

b)

Ice melts when heated.

c)

The density of iron 7.87 g/cm^3.

d)

Aluminum is a silver-colored metal.

2.

Which property could NOT be used to distinguish between table salt and table sugar?

a)

color

b)

density

c)

boiling point

d)

melting point

3.

Which of the following is an intensive property?

a)

mass

b)

volume

c)

color

d)

shape

4.

INTENSIVE or EXTENSIVE

your weight on the moon.

(a)  

5.

INTENSIVE or EXTENSIVE

the mass of powdered milk in your glass of milk.

(a)  

6.

INTENSIVE or EXTENSIVE

the temperature of boiling water

(a)  

7.

INTENSIVE or EXTENSIVE

the amount of dish washing liquid used to clean the dishes.

(a)  

8.
Anything that has mass and takes up space.
a)
volume
b)
matter
c)
solid
d)
temperature
9.
A change in which the form or shape of a substance changes but the chemical makeup of the substance remains the same.
a)
chemical change
b)
reaction
c)
physical change
d)
solution
10.
A change in one or more substances, caused by a reaction, that forms new and different substances.
a)
mixture
b)
physical change
c)
element
d)
chemical change
11.
The smallest unit into which an element can be divided and still retain all the properties of that element.
a)
atomic theory
b)
compound
c)
element
d)
atom
12.

Measuring the mass and volume of a piece of chalk is a way of investigating its ______________.

a)

Physical and intensive properties

b)

Physical and extensive properties

c)

Chemical and extensive properties

d)

Chemical and intensive properties

13.
What is a property?
a)
Something that describes matter
b)
a definition
c)
the space matter takes up
d)
the weight of matter
14.
Ability to rust is this type of property:
a)
Physical property
b)
Chemical property
15.
Physical properties are
a)
properties that can be observed without changing the identity of the substance
b)
properties that describe how a substance changes into a completely different substance
c)
properties that we can only observe with our eyes
d)
properties that we need special tools to observe
16.
What is burning an example of?
a)
physical change
b)
physical property
c)
chemical change
d)
chemical property
17.
Which is NOT a physical property:
a)
Density
b)
Flammability
c)
Boiling Point
d)
Color
18.

Properties that describe how a substance reacts with other substances are called?

a)

Chemical properties

b)

Physical properties

19.

Roasting a marshmallow over a campfire is an example of a _______ change.

a)

chemical

b)

physical

c)

both

20.

Drying wet hair is an example of a _______ change.

a)

chemical

b)

physical

c)

both

21.

The Statue of Liberty turning green over time from being exposed to oxygen is an example of a chemical change.

a)

True

b)

False

22.

Which state of matter takes BOTH the shape and volume of its container?

a)

solid

b)

liquid

c)

gas

23.

Particles move fastest in a

a)

solid

b)

liquid

c)

gas

24.

Particles are packed closest together in what state of matter?

a)

solid

b)

liquid

c)

gas

25.

Which phase change occurs when transitioning from a liquid to a gas?

liquid ---> gas

a)

melting

b)

vaporizing

c)

condensing

d)

freezing

26.

In order to transition from a liquid to a solid, a substance must

a)

absorb energy

b)

release energy

27.
It is a measure of how close measurements come to each other when they are made in the same way
a)
Accuracy
b)
Precision
c)
Error
d)
Extrapolation
28.

How close a measurement is to the accepted value is called..

a)

Accuracy

b)

Precision

c)

Significant

d)

Estimate

29.
A set of data are all close to each other, and they are close to the actual value.  This set of data can be described as...
a)
accurate
b)
precise
c)
both precise and accurate
30.

A measurement result is considered ________ if it is judged to be close to the true value. It is influenced by random and systematic errors.

a)

Precise

b)

Accurate

c)

An error

d)

Resolution

31.

A quality denoting the closeness of agreement (consistency) between values obtained by repeated measurement. It is influenced by random effects and can be expressed numerically.

a)

Repeatability

b)

Precision

c)

Uncertainty

d)

Resolution

32.

Express 23400 in proper scientific notation.

a)

2.34 x 104

b)

2.3 x 103

c)

2.30 x 105

d)

2.34 x 103

33.
How would you write 564,000,000 in scientific notation?
a)
5.64 x 10-7
b)
5.64 x 106
c)
5.64 x 108
d)
56.4 x 107
34.

Express the following in scientific notation: 0.000457

a)

457 x 106

b)

457 x 10-6

c)

4.57 x 104

d)

4.57 x 10-4

35.

Contains only one kind of atom.

a)

Element

b)

Compound

c)

Mixture

36.
A mixture that appears to be evenly mixed throughout:
a)
an atom
b)
a compound
c)
a homogeneous mixture
d)
a heterogeneous mixture
37.
A substance made of only one type of atom is called —
a)
an element
b)
a mixture
c)
a compound
d)
a salt
38.
Which of the following is a way in which elements and compounds are similar?
a)
Elements and compounds are pure substances.
b)
Elements and compounds are both made up of different kinds of atoms.
c)
Elements and compounds can both be broken down by physical means.
d)
Elements and compounds are listed on the periodic table.
39.
1 A substance made up of two or more chemically combinedelements is —
a)
an element
b)
mixture
c)
compound
d)
solution
40.

A substance that cannot be broken down further chemically is known as...

a)

an element

b)

a compound

c)

a molecule

d)

a mixture

41.
What are the 3 particles that make-up the atom?
a)

protons, neutrons, and isotopes

b)

neutrons, isotopes, and electrons

c)

positives, negatives, and electrons

d)

protons, neutrons, and electrons

42.

H2O is most accurately described as a ___________________.

a)

molecule

b)

compound

c)

element

d)

atom

43.

Hydrogen is an example of a(n)-

a)

element

b)

compound

44.

What is the Law of Conservation of Mass?

a)

It states that no matter can be created or destroyed.

b)

It states that matter can be created or destroyed.

c)

It sates that no energy can be created or destroyed.

d)

It state that no sound can be created or destroyed.

45.
Which of the following is a chemical change?
a)
distillation
b)
rotting
c)
crystallization
d)
vaporization
46.
Which of the following is a compound?
a)
oxygen
b)
gold
c)
lead
d)
water
47.
Which of the following is a physical property?
a)
luster
b)
ability to react with water
c)
flammability
d)
ability to explode in air
48.
What is the charge of the neutron
a)
Positive
b)
negative
c)
Neutral
49.
What subatomic particles are in the nucleus?
a)
protons + neutrons
b)
protons + electrons
c)
neutrons + electrons
50.
What is the charge of an electron?
a)
Positive
b)
neutral
c)
negative
51.
All of the following are true of isotopes of an element except __
a)
They have different mass numbers
b)
They have the same number of protons
c)
They have the same atomic number
d)
They have the same number of neutrons
52.

The figure shows ________________________

a)

cathode ray tube experiment

b)

gold foil experiment

c)

oil drop experiment

53.
Alpha particles.....
a)
a) are positively charged.
b)
b) consist of two protons and four neutrons.
c)
c) can penetrate any thickness of matter
d)
d) All of the above 
54.
Radioactive materials have unstable...
a)
electrons
b)
protons
c)
nuclei
d)
neutrons
55.
Negatively charged particles emitted from a nucleus at a high speed are ____.  
a)
alpha particle
b)
gamma rays
c)
beta particles
d)
X rays
56.

In alpha decay, the mass number...

a)

increases by 2

b)

decreases by 2

c)

increases by 4

d)

decreases by 4

57.

In alpha decay, the atomic number...

a)

increases by 2

b)

decreases by 2

c)

increases by 4

d)

decreases by 4

58.
Uranium-238  decays into  Thorium-234  by emitting .........
a)
an alpha particle
b)
a beta particle
c)
gamma rays
d)
visible light
59.

What is the product of the alpha decay of Thorium-232 ( 90232Th^{232}_{90}Th )?

a)

88228Ra^{228}_{88}Ra

b)

91232Pa^{232}_{91}Pa

c)

89228Ac^{228}_{89}Ac

d)

92232U^{232}_{92}U

60.
The process of nuclear change in an atom of radioactive material is called... 
a)
nuclear decay
b)
nuclear mass
c)
isotopes
d)
radon
61.
When a nucleus undergoes nuclear decay by gamma rays, the atomic number of the element....
a)
remains the same
b)
  decreases by one.
c)
increases by one.
d)
increases by two.
62.
The three types of nuclear radiation in increasing order of penetrating power are ____.  
a)
  alpha, beta, gamma 
b)
X ray, beta, gamma
c)
alpha, gamma, beta 
d)
X ray, gamma, beta 
63.

The fluorine atom has an atomic number of

a)

19

b)

9

64.
What is an isotope? 
a)

A charged atom

b)

An atom with different amounts of neutrons

c)

An atom with different amounts of protons

d)

A neutral atom

65.

Which of the following can vary for atoms of the same element?

a)

number of protons

b)

number of electrons

c)

number of neutrons

66.
How many neutrons does oxygen have?
a)

16

b)

15.99

c)

8

d)

Doesn't contain any neutrons

67.

Which of the three sub-atomic particles is the lightest?

a)

the proton

b)

the electron

c)

the neutron

68.

Why are all atomic masses not nearly whole numbers?

a)

This is due to the mass of all the electrons in the atom.

b)

This is because of experimental error.

c)

This is because atomic masses are the weighted average of the masses of all naturally-occurring isotopes.

d)

This is due to binding energy of the atoms.

69.

The atomic number of an element is defined by its number of ________.

a)

protons

b)

neutrons

c)

electrons

d)

nuclei

70.

The sum of the protons and neutrons in a nucleus is __________.

a)

the atomic number

b)

the mass number

c)

Avogadro's number

d)

the element number

71.

Which of the following is true for any atom?

a)

atomic number = number of protons = number of electrons

b)

atomic number = number of neutrons = number of electrons

c)

mass number = number of protons = number of electrons

d)

mass number = number of protons = number of neutrons

72.

How is the atomic mass unit (amu) defined?

a)

1/12 the mass of a carbon-12 atom

b)

1/14 the mass of a nitrogen-14 atom

c)

1/13 the mass of a carbon-13 atom

d)

1/16 the mass of an oxygen-16 atom

73.
How many protons does this isotope of titanium have?
a)
48
b)
22
c)
26
d)
70
74.

smallest particle of matter that retain the properties of element is ____________________

a)

atom

b)

proton

c)

cathode

d)

energy

75.

electrons are discovered by _________experiment

a)

cathode ray tube

b)

gold foil

c)

oil drop

76.

The figure shows _____________experiment

a)

oil drop

b)

cathode ray tube

c)

gold foil

77.

The experiment ( shown in the figure ) lead to determine __________

a)

mass and charge of the electron

b)

the size of the electron

c)

the mass of the atom

d)

the charge of the atom

78.

The name of the model of the atom ( shown in the figure) is _______________

a)

plum pudding model

b)

nuclear model

c)

energy levels model

d)

quantum model

79.

the part ( labeled by the question mark in the figure ) is _______________

a)

atom

b)

nucleus

c)

proton

d)

electron

80.

Who was the first person to "think" of an atom?

a)

Democritus

b)

J.J. Thompson

c)

Rutherford

d)

Bohr

81.

Used the word "atomos" to decsribe the uncuttable (indivisible) atom.

a)

Democritus

b)

Thomson

c)

Bohr

d)

Dalton

82.
In Dalton's Atomic Theory, all elements consist of __________ that cannot be divided.
a)
Atoms
b)
Parts
c)
Molecules
d)
Hydrogen
83.

Who came up with the Atomic Theory?

a)

Dalton

b)

Thomson

c)

Goldstein

d)

Democritus

84.
How many neutrons does the isotope below have?     89 36Kr
a)
53
b)
36
c)
89
d)
125
85.

What is the relative electric charge of a neutron?

a)

+1

b)

-1

c)

0

d)

none of the above

86.

Who did not believe that empty space could exist?

a)

Aristotle

b)

Democritus

c)

Dalton

d)

J.J. Thomson

87.

The law of definite proportions states that a given chemical compound always contains the same _ in the exact same _ by mass.

a)

elements, compounds

b)

elements, molecules

c)

elements, proportions

d)

proportions, elements

88.

The percentage of copper and oxygen in samples of “CuO” obtained by different methods were found to be the same. This illustrates the law of:

a)

Definite proportions

b)

Conservation of mass

c)

Multiple proportions

d)

Reciprocal proportions

89.

What is the Law of Definite Proportions?

a)

The Law of Definite Proportions states that the mass of a compound is always equal to the sum of the masses of its elements.

b)

A chemical compound always contains the same elements in the same proportions by mass.

c)

The Law of Definite Proportions only applies to organic compounds.

d)

A chemical compound contains different elements in different proportions by mass.

90.

the law that states that when two elements combine to form two or more compounds the mass of one element that combines with a given mass of the others is in the ratio of small whole number

a)

law of conservation of mass

b)

law of definite proportions

c)

law of whole numbers

d)

law of multiple proportions

91.

In the formation of carbon monoxide and carbon dioxide, the mass ratio of oxygen that combines with a fixed mass of carbon is an example of which law?

a)

Law of Conservation of Mass

b)

Law of Definite Proportions

c)

Law of Multiple Proportions

d)

Law of Constant Composition

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