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Chemistry A Review for Trimester Exam

Total questions: 83

Worksheet time: 1hrs 23mins

Name
Class
Date
1.

What is the smallest unit of matter? It is composed of protons and neutrons, held together in the nucleus, and electrons around the nucleus in different electron orbitals, which form an electron cloud.

a)

cell

b)

nucleus

c)

atom

d)

electron

2.

What is a subatomic particle with a positive charge that is in the nucleus of an atom?

a)

neutron

b)

proton

c)

electron

d)

valence electron

3.

What is a subatomic particle without an electric charge, located in the nucleus of an atom?

a)

neutron

b)

proton

c)

electron

d)

valence electron

4.

What is a subatomic particle with a negative charge? It is found in the electron cloud surrounding the nucleus.

a)

neutron

b)

proton

c)

electron

d)

electron cloud

5.

What is the center of an atom containing protons and neutrons?

a)

nucleus

b)

neutron

c)

proton

d)

electron cloud

6.

What is the number of protons in the nucleus of an atom that determines the chemical properties of an atom?

a)

mass number

b)

atomic mass

c)

atomic number

d)

atomic symbol

7.

What is the combined mass of all the protons and neutrons of an atom and is approximately equal to the number of protons and neutrons?

a)

atomic mass

b)

atomic number

c)

subatomic particles

d)

nucleus weight

8.

The number 16 for the atomic element sulfur is the

a)

ionic number

b)

isotope

c)

atomic mass

d)

atomic number

9.

How many protons does sulfur have?

a)

32

b)

16

c)

48

d)

12

10.

How many electrons does sulfur have

a)

16

b)

32

c)

48

d)

12

11.

The energy of movement is ___.

a)

potential energy

b)

kinetic energy

c)

mechanical energy

12.
a)
Gases do not move in straight line
b)
Most of the volume of gas is empty space
c)
Gas particles are not in constant random motion
d)
Gas particles attract each other
13.
Of these three states of matter, which one has the most kinetic energy? 
a)
Solid 
b)
Liquid 
c)
Gas
14.

How many neutrons are in an atom of carbon-14?

a)

6

b)

8

c)

10

d)

14

15.

How many protons does this isotope of titanium have?

a)

22

b)

26

c)

48

d)

70

16.

How many electrons are in an atom that has an atomic number of 34, an atomic mass of 74 and a charge of -2?

a)

2

b)

34

c)

36

d)

40

17.
What is the name of the pictured isotope?
a)
Carbon-12
b)
Carbon-13
c)
Carbon-14
d)
Carbon-15
18.

What charge does an atom have when it GAINS electrons?

a)

Positive

b)

Negative

c)

Neutral

19.

What is a representation of an ion?

a)

Li

b)

Na-22

c)

O-2

20.

What is the mass number of bromine?

a)

35

b)

45

c)

80

d)

79.904

21.

How many neutrons does this bromine atom have?

a)

35

b)

45

c)

80

22.

What charge does an atom have when it GAINS electrons?

a)

Positive

b)

Negative

c)

Neutral

23.

What is a representation of an ion?

a)

Li

b)

Na-22

c)

O-2

24.

What is the mass number of bromine?

a)

35

b)

45

c)

80

d)

79.904

25.

How many neutrons does this bromine atom have?

a)

35

b)

45

c)

80

26.

What type of atom is this?

a)

Neutral atom

b)

Cation

c)

Anion

d)

Isotope

27.

What two particles determine the mass number?

a)

Protons and electrons

b)

Electrons and neutrons

c)

Protons and neutrons

28.

How many electrons does this magnesium ion have?

a)

24

b)

12

c)

10

d)

14

29.

What does it change in an ion?

a)

The number of electrons

b)

The number of protons

c)

The number of neutrons

30.

What is the representation of an isotope?

a)

N-3

b)

Al+3

c)

Si

d)

P-33

31.

How many neutrons does this Neon atom have?

a)

21

b)

11

c)

10

d)

12

32.

What does it happen to this atom?

a)

It LOSES electrons

b)

It GAINS electrons

c)

It GAINS protons

d)

It LOSES protons

33.

What type of atom is element C?

a)

Normal atom

b)

Ion

c)

Isotope

34.

What is the mass number of this element?

a)

12

b)

24

c)

23

d)

11

35.

What is the mass number of this Neon atom?

a)

10

b)

11

c)

21

d)

20

36.

What type of atom is this?

a)

Normal Atom

b)

Cation

c)

Anion

d)

Isotope

37.

What is the atomic number of this element?

a)

12

b)

24

c)

23

38.

What does it change in an ion?

a)

The number of electrons

b)

The number of protons

c)

The number of neutrons

39.
Electronegativity is the...
a)
energy needed to remove the outermost electron.
b)
ability of an atom to attract electrons from another atom.
40.
Which element has the smaller atomic radius: potassium (K) or bromine (Br)?
a)
potassium (K)
b)
bromine (Br)
41.
Which element has the greatest electronegativity: Nitrogen (N) or Arsenic (As)?
a)
Nitrogen (N)
b)
Arsenic (As)
42.

Which of these has the smallest atomic radius?

a)

K

b)

Rb

c)

Fr

d)

Cs

43.
How many electrons does Si contain? (click to see image)
a)
14
b)
28
c)
2
d)
None of these
44.
What element is represented in this Bohr Model? 
a)
Carbon
b)
Hydrogen
c)
Aluminum
d)
Lithium
45.
What is the mass number of this atom?
a)
1
b)
3
c)
4
d)
7
46.
What's a valence electron?
a)
electrons in the second energy level
b)
electrons in the outermost energy level
c)
the atomic number
d)
electrons in the first level
47.
Identify the element in the picture
a)
Boron
b)
Carbon
c)
Nitrogen
d)
Lithium
48.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
49.
Hydrogen needs _____ electrons in its valence shell to be stable.
a)
4
b)
6
c)
8
d)
2
50.
Three pairs of electrons are shared in a
a)
Single bond
b)
Double bond
c)
Triple bond
51.
A covalent bond is
a)
a bond that shares electrons metallicaly
b)
A bond that shares electrons with non metals
c)
Metalloids bonding
d)
metals and nonmetals bonding
52.
Which of the following is the correct Lewis dot structure for the molecule fluorine (F2)?
a)
A
b)
B
c)
C
d)
D
53.
How many valence electrons are in Phosphorus?
a)
15
b)
4
c)
5
d)
31
54.
How many electrons does each line indicate are shared?
a)
1
b)
2
c)
3
d)
4
55.
What side of the periodic table are metals on?
a)
left
b)
right
c)
top
d)
bottom
56.
Is oxygen metal or nonmetal?
a)
metal
b)
nonmetal
57.
Is gold metal or nonmetal?
a)
metal
b)
nonmetal
58.
What do metals conduct?
a)
heat
b)
electricity
c)
both
d)
neither
59.
How would this element be classified?
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Metamorphic
60.
What atom matches this electron configuration?
1s22s22p63s23p64s23d10
a)
Zinc
b)
Copper
c)
Nickel
d)
Germanium
61.
The electron configuration of an atom is 1s22s22p6.  The number of electrons in the atom is 
a)
3
b)
6
c)
8
d)
10
62.
Which electron configuration belongs to Chlorine (Cl)?
a)
1s2 2s2 2p6 3s2 3p5
b)
1s2 2s2 2p6 3s2 3p6
c)
1s2 2s2 2p6 3s2 3p7
63.
What atom matches this electron configuration?
1s22s22p63s2
a)
Neon
b)
Magnesium
c)
Aluminum
d)
Potassium
64.

The chemical bond between a non-metal and another non-metal will be a ________ bond.

a)

metal

b)

ionic

c)

covalent

d)

polar

65.

The chemical bond between a metal and a non-metal will be a _____ bond.

a)

metal

b)

ionic

c)

covalent

d)

polar

66.

Beryllium and sulfur will form a ______ bond

a)

ionic

b)

covalent

c)

metalloid

67.

Sodium and Bromine will make a _____ bond.

a)

ionic

b)

covalent

c)

metallic

68.

MgO

a)

ionic

b)

covalent

c)

metallic

69.

If two fluorine atoms bond they will make a _____ bond.

a)

ionic

b)

covalent

c)

metallic

70.
Name the following ionic compound: BeCl2
a)
beryllium chlorine
b)
beryllium II chloride
c)
beryllium chloride
d)
beryllium dichloride
71.

Name the following ionic compound: MgSO4

a)

magnesium (II) sulfide

b)

magnesium sulfide

c)

magnesium sulfate

d)

magnesium (II) sulfate

72.

Name the following compound: FeCl3

a)

iron chloride

b)

iron III chloride

c)

iron II chloride

d)

iron III chlorate

73.

The formula for Magnesium phosphide is:

a)

Mg3(PO4)2

b)

MgP

c)

MgPO4

d)

Mg3P2

74.
What is the correct formula for Sodium Oxide?
a)
NaO
b)
NaO2
c)
Na2O
d)
Na2O2
75.

What is the compound formula for the ions Na+ and Cl- ?

a)

Na2Cl4

b)

NaCl

c)

sodium chloride

76.

Name the following covalent compound: N2O5

a)

dinitrogen pentoxide

b)

nitrous oxide

77.

Name the following covalent compound: CO2

a)

carbon dioxide

b)

carbide oxygen

78.

Nonmetals tend to

a)

Lose electrons

b)

Gain electrons

79.

If I gain electrons I become

a)

Same because I am balanced

b)

Positive because I have added to my atom

c)

Negative because I have added electrons

d)

Equal because I have electrons

80.

A chemical bond where electrons are gained/lost

a)

Ionic bond

b)

Covalent bond

c)

James Bond

d)

Polar bond

81.

If my charge becomes 2+ what does that say about me?

a)

I am stealing 2 electrons

b)

I am losing 2 electrons

c)

I am in period 2

d)

My atomic number is 2

82.
How strongly an atom attracts electrons is called....................
a)
Ionization energy
b)
Electronegativity
c)
Electricity
d)
Nuclear force
83.
What is the correct formula for this molecule?
a)
NH
b)
N3H
c)
NH3
d)
NH4

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