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Gr. 9 Chemistry Revision 1

Total questions: 128

Worksheet time: 1hrs 19mins

Name
Class
Date
1.

Click the letter of the correct answer.


1. Which type of matter has the molecules packed closer together?

a)

a. Solid

b)

b. Liquid

c)

c. Gas

d)

d. Plasma

2.

Which of the following best describes matter?

a)

Anything that has volume.

b)

Anything that can be turned into liquid.

c)

Anything that has mass and occupies a space.

d)

Anything that has definite weight.

3.

Which of the following has the weakest force of attraction between the particles?

a)

solid

b)

liquid

c)

gas

d)

vacuum

4.

The attractive force of the particles of gas is _____________.

a)

weak

b)

strong

c)

very strong

d)

intermediate

5.

Which of the following statements BEST describes the particles of a gas?

a)

The particles are not attached and move rapidly in any direction.

b)

All the particles are attached to each other.

c)

The particles are not attached and move slowly.

d)

The particles are arranged in sequence and move rapidly.

6.

Which of the following has the strongest force of attraction between the particles?

a)

plasma

b)

solid

c)

liquid

d)

gas

7.

Which BEST describes the particles of a solid?

a)

vibrate in fixed position

b)

have large spaces in between

c)

have weak attractive force

d)

completely immobile

8.

Which of the following are examples of energy? (select all that apply)

a)

zebra

b)

kinetic

c)

heat

d)

potential

e)

atoms

9.

For a given element, in which state of matter would you expect it to have the greatest amount of POTENTIAL energy?

a)

liquid

b)

solid

c)

gas

10.

A combination of two or more atoms that can be the same or different is called a(n) ___.

a)

molecule

b)

element

c)

isotope

d)

ion

11.

Which molecule has more atoms in it: CO or CO2?

a)

CO

b)

CO2

c)

They have the same number of atoms

12.

How many atoms are in 1 molecule of CH4?

a)

2

b)

3

c)

4

d)

5

13.

How many atoms are in 1 molecule of H2O?

a)

1

b)

3

c)

4

d)

2

14.

What happens to the attractive forces of liquid particles when they are cooled?

a)

start to strengthen

b)

remain the same

c)

start to weaken

d)

start to increase

15.

Which is NOT an example of matter?

a)

chalk

b)

sound

c)

air

d)

water

16.

An ____ is the simplest form of matter that has a characteristic set of properties.

a)

molecule

b)

element

c)

compound

17.

____one or two letters represent element

a)

chemical symbol

b)

chemical equation

c)

chemical formula

18.

Give reason scientists use model to represent atom

a)

because atoms are too large

b)

because atoms are too small

c)

because atoms form molecules

19.

which of the following is element

a)

H2O

b)

N

c)

NaCL

20.

Molecules are hold to gather by

a)

chemical formula

b)

chemical equation

c)

chemical bond

21.

shows you how many element in molecule

a)

chemical equation

b)

chemical formula

c)

chemical bond

22.

what is the name of this model

a)

marble model

b)

molecular model

23.

a strong force of attraction that hold atoms

a)

repulsion force

b)

binding force

24.

_______is the capacity to move, do work, change matter, or produce heat.

a)

chemical bond

b)

binding force

c)

energy

25.

Kinetic energy is the energy that matter has because of its position.

a)

true

b)

false

26.

this energy can be released or absorbed during a chemical process.

a)

chemical energy

b)

kinetic energy

27.

_______of matter is the total kinetic energy of all the particles that make up the matter.

a)

thermal energy

b)

chemical energy

c)

kinetic energy

28.

_______is a portion of the universe that a scientist identifies for study.

a)

system

b)

surrounding

c)

universe

29.

melting point is an example of _________properties

a)

Macroscopic

b)

microscopic

c)

chemical

30.

why sugar is matter but heat is not ?

a)

because heat has mass not volume

b)

because sugar has mass and takes up space but heat has no mass cant occupied the space

c)

because heat has mass and takes up space but sugar has no mass cant occupied the space

31.

Lists the following molecules according to increasing number of atoms that make up its molecule: CH4,NH3,Br2 ,Co2

a)

NH3,CO3,CH4,Br2

b)

CO3,CH4,Br2

c)

Br2,CO2,NH3,CH4

32.

Click the letter of the correct answer.


1. Which type of matter has the molecules packed closer together?

a)

a. Solid

b)

b. Liquid

c)

c. Gas

d)

d. Plasma

33.

Click the letter of the correct answer.


4. Which best describes the particles in a liquid?

a)

a. More freely moving than a gas

b)

b. More freely moving than a solid

c)

c. Less freely moving than a solid

d)

d. Completely unmoving

34.

Click the letter of the correct answer.


9. To describe a solid, you could say:

a)

a. The particles of a solid are not attracted to each other

b)

b. The particles of a solid can move past one another

c)

c. The particles of a solid vibrate but do not move past one another

d)

d. A solid has mass but does not take up space

35.

Which BEST describes the particles of a solid?

a)

completely immobile

b)

vibrate in fixed position

c)

have weak attractive force

d)

have large spaces in between

36.

Which of the following has the strongest force of attraction between the particles?

a)

solid

b)

liquid

c)

gas

d)

plasma

37.

Which of the following states of matter has a definite shape and definite volume.

a)

solid

b)

liquid

c)

gas

d)

plasma

38.

In which state of matter are particles held together by weak forces of attraction and are able to move freely over long distances?

a)

Gas

b)

Liquid

c)

Plasma

d)

Solid

39.

What term describes a solid changing to a liquid?

a)

Deposition

b)

Freezing

c)

Melting

d)

Sublimation

40.

What term describes a liquid changing to a solid?

a)

Deposition

b)

Freezing

c)

Melting

d)

Sublimation

41.

What is the energy stored in the chemical bonds that hold atoms together called?

a)

Kinetic energy

b)

Thermal energy

c)

Potential energy

d)

Chemical potential energy

42.

What happens to a solid when it gains enough energy and reaches its melting point?

a)

It evaporates

b)

It condenses

c)

It sublimates

d)

It melts into a liquid

43.

What is the stored energy in matter due to its position relative to other matter called?

a)

Kinetic energy

b)

Thermal energy

c)

Potential energy

d)

Chemical potential energy

44.

What is the total kinetic energy of all the particles that make up matter called?

a)

Kinetic energy

b)

Thermal energy

c)

Potential energy

d)

Chemical potential energy

45.

What holds two atoms together in a molecule?

a)

Chemical symbols

b)

Chemical formulas

c)

Chemical bonds

d)

Chemical reactions

46.

What is an element?

a)

Particles that are too tiny to see without powerful microscopes

b)

The fundamental building blocks of matter

c)

The smallest representative unit of an element

d)

The simplest form of matter that has a characteristic set of properties

47.

What is matter?

a)

Anything that has mass and occupies space

b)

Particles that are too tiny to see without powerful microscopes

c)

The fundamental building blocks of matter

d)

The simplest form of matter that has a characteristic set of properties

48.

•Matter is made of particles that are too tiny you can see by your eyes

a)

True

b)

false

49.

____one or two letters represent element

a)

chemical equation

b)

chemical formula

c)

chemical symbol

50.

________is formed when two or more atoms combined chemically

a)

atom

b)

molecule

c)

element

51.

Molecules are hold to gather by

a)

chemical equation

b)

chemical formula

c)

chemical bond

52.

_______is the capacity to move, do work, change matter, or produce heat.

a)

binding force

b)

energy

c)

chemical bond

53.

melting point is an example of _________properties

a)

chemical

b)

microscopic

c)

Macroscopic

54.

What is a characteristic that is large enough to see, handle, or measure without magnification called?

a)

Macroscopic property

b)

Microscopic property

c)

Atomic property

d)

Molecular property

55.

What happens to a solid when it gains enough energy and reaches its melting point?

a)

It evaporates

b)

It condenses

c)

It freezes

d)

It melts

56.
Which particle has a positive charge?
a)
electron
b)
orbital
c)
proton
d)
neutron
57.
Choose the particle that has no charge.
a)
nucleus
b)
neutron
c)
proton
d)
electron
58.
This particle determines what element you have - the elements identity.
a)
electron
b)
proton
c)
neutron
d)
valence shell
59.
What is the mass of a proton and a neutron?
a)
1amu
b)
2grams
c)
13amu
d)
10cm
60.
Which particles make up the nucleus of an atom?
a)
protons and neutrons
b)
electrons and protons
c)
electrons, protons, and neutrons
d)
electrons and neutrons
61.
What is the mass number and name of an element with 8 protons and 8 neutrons?
a)
16 - Carbon
b)
16 - Oxygen
c)
24 - Oxygen
d)
8 - Neon
62.
The mass of one proton is equal to the mass of one...
a)
neutron
b)
electron
63.
The mass of one proton is greater than the mass of one...
a)
neutron
b)
electron
64.
All of the mass of an atom comes from what location?
a)
nucleus
b)
electron cloud
65.
What is an atom mostly made up of?
a)
protons
b)
electrons
c)
empty space
d)
neutrons
66.
True or False: An isotope is when the protons and neutrons are the same, but the electrons are different.
a)
True
b)
False
67.

Calculate the average atomic mass of silver.

a)

106.38649amu

b)

111.91896amu

c)

107.8677amu

d)

121

68.
Compute the average atomic mass for silicon:
a)
27.977
b)
28.09
c)
28.976
d)
The average mass cannot be determined from provided information.
69.
the central region of an atom where its neutrons and protons are is its 
a)
nucleus 
b)
electron cloud
c)
core 
d)
center 
70.
an atom with atomic number 6 would have how many protons 
a)
6
b)
12
c)
3
d)
cannot be determined 
71.

What does the 1.00794 stand for?

a)

mass number

b)

atomic number

c)

average atomic mass

d)

number of protons

72.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
73.

If an atom has 12 protons, which of the following must it also have to be considered a neutral atom?

a)

12 neutrons

b)

12 electrons

c)

12 protons

d)

24 protons and neutrons

74.
If an atom has 10 protons, 10 neutrons, and 10 electrons, what is the mass of the atom?
a)
10
b)
20
c)
30
75.

What charge does an atom have when it GAINS electrons?

a)

Positive

b)

Negative

c)

Neutral

76.

What two particles determine the mass number?

a)

Protons and electrons

b)

Electrons and neutrons

c)

Protons and neutrons

77.

When an atom loses an electron, it becomes a(n) _____________ ion.

a)

positive

b)

negative

c)

neutral

d)

polyatomic

78.

If the mass number of this chlorine atom is 36, how many neutrons does it have?

a)

17

b)

18

c)

19

d)

can't be determined

79.

What is the atomic number of this atom shown in the Bohr model?

a)

11

b)

12

c)

13

d)

can't be determined

80.

What is the mass number of the atom shown in the Bohr model?

a)

11

b)

12

c)

23

d)

Can't be determined

81.

Is this atom an ion? If so what would it's charge be?

a)

Yes, 1-

b)

No it is neutral

c)

Yes, 1+

d)

Can't be determined

82.

Most of the mass of an atom is found in the ______.

a)

nucleus

b)

proton

c)

electron cloud

d)

isotope

83.
An atom with an unequal number of protons and electrons is said to have (a) ___.
a)
no charge
b)
balance
c)
charge
d)
unbalance
84.
Two atoms of the same element but with different mass numbers are called________
a)
electrons
b)
isotopes
c)
variables
d)
electron cloud
85.

An Atoms has 8 protons 9 neutrons and 8 electrons, what is its atomic number

a)

8

b)

9

c)

17

d)

16

86.

An Atoms has 8 protons 9 neutrons and 8 electrons, what is its mass number

a)

8

b)

9

c)

16

d)

17

87.

How many elements are on the periodic table

a)

118

b)

102

c)

108§

d)

120

88.

How are elements arranged on the periodic table

a)

Increasing atomic mass

b)

Decreasing atomic mass

c)

Increasing atomic number

d)

Decreasing atomic number

89.
What part of an atom is NEGATIVELY charged?
a)
protons
b)
neutrons
c)
electrons
d)
atoms
90.
Which part of an atom is POSITIVELY charged?
a)
protons
b)
neutrons
c)
electrons
d)
atoms
91.
Which part of an atom has no charge?
a)
protons
b)
neutrons
c)
electrons
d)
atoms
92.

The mass number of iodine is 126, and it’s in the 53rd place in the periodic table. It has ________________ protons and ______________ neutrons.

a)

126 protons and 53 neutrons

b)

53 protons and 126 neutrons

c)

53 protons and 73 neutrons

d)

73 protons and 53 neutrons

93.
What does the nucleus of an atom contain?
a)
Electrons & Neutrons
b)
Protons & Neutrons
c)
Neutrinos & Positrons
94.
What are electrons?
a)
Massive, positively charged particles
b)
Tiny, negatively charged particles
c)
Clouds of dust in the nucleus
d)
Neutral particles around the nucleus
95.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
96.
If an atom has 12 positively charged subatomic particles, which of the following must it also have to be considered a neutral atom?
a)
12 neutrons
b)
12 electrons
c)
12 protons
d)
24 protons and neutrons
97.
An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.
a)
20
b)
10
c)
5
d)
25
98.
An element with a mass number of 11 and an atomic number of 5 has how many neutrons?
a)
11
b)
5
c)
6
d)
16
99.
Which letter represents the nucleus?
a)
A
b)
B
c)
D
d)
E
100.
Which letter represents an electron?
a)
A
b)
B
c)
C
d)
D
101.
What is the atomic number of the atom pictured? 
a)
9
b)
10
c)
18
d)
19
102.

What does the 1.00794 stand for?

a)

Hydrogen

b)

atomic number

c)

atomic mass

d)

atomic explosion

103.

What subatomic particles would you find in the nucleus of an atom?

a)

Protons only

b)

Protons and Neutrons

c)

Neutrons and Electrons

d)

Protons and Electrons

104.
What is the atomic mass of "F"
a)
9
b)
18
c)
17
d)
19
105.
How many protons are in an atom of carbon?
a)
12.01
b)
8
c)
6
d)
14
106.

Which number here is the atomic number?

a)

5

b)

10.811

107.

What is the lowest possible energy level that an electron can occupy?

a)

Fundamental state

b)

Ground State

c)

Excited State

d)

Outermost state

108.

Which drawing represents the process by which an emission line is formed? [Emission means that energy is being "emitted" or released by the atom.]

a)

A

b)

B

c)

C

d)

D

109.

The unknown emissions spectra belongs to the element

a)

Hydrogen

b)

Mercury

c)

Neon

d)

Sodium

110.

How many electrons can fit on the 1st energy level (orbital) for any Bohr Model?

a)

2

b)

6

c)

8

d)

10

111.

this model represents _________

a)

ground state

b)

excited state

112.

______is a tool uses prism to separate light into is individual color

a)

microscope

b)

telescope

c)

spectroscopy

113.

In which state does an electron have the least amount of energy?

a)

Bohr model

b)

Orbital

c)

Ground state

d)

Excited state

114.

For an electron to change from ground state to an excited stated it must...

a)

Absorb energy

b)

Release energy

115.

When an electron returns to ground state from an excited state, the atom will (a)

a)

rotate

b)

emit energy

c)

wiggle

d)

absorb energy

116.

In order to go from ground state to an excited state, an electron must

a)

wiggle

b)

emit energy

c)

absorb energy

117.

What subatomic particle is responsible for the spectral lines seen in emission spectra diagrams? (a)

a)

protons

b)

neutrons

c)

electrons

118.

Each element on the periodic table can be identified by its

a)

location on the table.

b)

classification as a solid, liquid or gas.

c)

ability to react to form compounds.

d)

unique spectral "fingerprint."

119.

What is the LOWEST possible energy level that an electron can occupy?

a)

Excited State

b)

Fundamental State

c)

Ground State

d)

Outermost State

120.

When atoms absorb energy, electrons ..............energy level

a)

move to higher

b)

move to lower

c)

stays in the same

121.

Each spectral line corresponds to ................. emitted.

a)

exactly one wavelength

b)

two wavelengths

c)

more than two wavelengths

122.

If an electron moves from n=4 to n=2 it ____

a)

absorbs energy

b)

releases energy

123.

The unknown emissions spectra belongs to the element

a)

Hydrogen

b)

Mercury

c)

Neon

d)

Helium

124.
Why are line emission spectra of elements called "atomic fingerprints"?
a)
They are all the same
b)
They are all unique
c)
They are all similar
d)
They all contain colored light
125.

The unknown emissions spectra belongs to the element

a)

Hydrogen

b)

Mercury

c)

Neon

d)

Sodium

126.
Which elements are in the unknown sample?
a)
A and B
b)
B and C
c)
A and D
d)
B and D
127.
What gases are in the unknown mixture?
a)
Gas B & Gas D
b)
Gas C & Gas B
c)
Gas A & Gas D
d)
Gas D & Gas C
128.

What is the lowest possible energy level that an electron can occupy?

a)

Fundamental state

b)

Ground State

c)

Excited State

d)

Outermost state

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