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Unit 7 and 8 Review

Total questions: 75

Worksheet time: 25mins

Name
Class
Date
1.

The atomic number identifies the number of __________.

a)

electrons

b)

atoms

c)

protons

d)

neutrons

2.

Subatomic particles that have a negative charge

a)

electrons

b)

protons

c)

quarks

d)

neutrons

3.

The number 16 for the atomic element sulfur is the

a)

ionic number

b)

isotope

c)

atomic mass

d)

atomic number

4.

How many protons does sulfur have?

a)

32

b)

16

c)

48

d)

12

5.

How many electrons does sulfur have

a)

16

b)

32

c)

48

d)

12

6.

Subatomic particle that has a positive charge

a)

electron

b)

poitron

c)

neutron

d)

proton

7.

The center of an atom is called the ________________.

a)

electron cloud

b)

nucleus

c)

neutrion

d)

nuetron

8.

In what part of an atom can the protons and neutrons be found?

a)

nucleus

b)

neutrine

c)

electron cloud

d)

proton cloud

9.

Which parts of the atom move around the nucleus?

a)

electrons

b)

protons

c)

electrode particles

d)

neutrons

10.

What is the atomic number of this atom?

a)

1

b)

3

c)

4

d)

7

11.

What is the mass number of this atom?

a)

1

b)

3

c)

4

d)

7

12.

How many electrons does this atom have?

a)

2

b)

4

c)

6

d)

10

13.

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

a)

20

b)

10

c)

35

d)

25

14.
The atomic number of an element that has 9 protons, 9 electrons, and 10 neutrons is _____.
a)
9
b)
10
c)
19
d)
28
15.
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
16.
An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?
a)
15
b)
31
c)
16
d)
47
17.
What is the atomic number of the atom pictured? 
a)
9
b)
10
c)
18
d)
19
18.

Which of the following determines the identity of an element?

a)

number of protons

b)

atomic mass

c)

number of neutrons

d)

number of shells

19.

What is the atomic number?

a)

35

b)

18

c)

17

d)

52

20.

How many protons and electrons does this element have?

a)

35

b)

18

c)

17

d)

52

21.

How many neutrons does Chlorine have?

a)

18

b)

17

c)

35

d)

52

22.

How many neutrons does calcium have?

a)

20

b)

40

c)

60

d)

0

23.

What is the atomic mass of Arsenic?

a)

33

b)

107

c)

75

24.
Beryllium is in group number______.
a)
Group 2
b)
Group 3
c)
Group 4
d)
Group 7
25.
The period for Bromine is ___________.
a)
3
b)
2
c)
4
26.
The horizontal row on the periodic table is called a
a)
group
b)
family
c)
period
d)
atomic number
27.
a)
energy levels
b)
valence electrons
c)
protons
d)
neutrons
28.
a)
energy levels
b)
valence electrons
c)
protons
d)
neutrons
29.
a)
Same group
b)
Same period
30.
a)
Group 1
b)
Group 17
c)
Group 2
d)
Group 18
31.
a)
Group 1
b)
Group 17
c)
Group 18
d)
Group 2
32.
a)
Group 1
b)
Group 17
c)
Group 18
d)
Group 2
33.
a)
Metals
b)
Nonmetals
c)
Metalloids
34.
a)
Metals
b)
Nonmetals
c)
Metalloids
35.
a)
Metals
b)
Nonmetals
c)
Metalloids
36.
a)
Metals
b)
Nonmetals
c)
Metalloids
37.
a)
Metals
b)
Nonmetals
c)
Metalloids
38.
a)
Metals
b)
Nonmetals
c)
Metalloids
39.
a)
Metals
b)
Nonmetals
c)
Metalloids
40.
a)
Metals
b)
Nonmetals
c)
Metalloids
41.
What happens in ALL chemical changes?
a)
Change in state of matter
b)
A new substance is formed
c)
Bubbles are produced
d)
An explosion
42.
A change where one or more new substances are created.
a)
Physical Change 
b)
Chemical Change 
43.

What happens in a chemical change?

a)

The atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed.

b)

When objects or substances undergo a change that does not change into a different substance.

44.

What happens in a physical change?

a)

The atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed.

b)

When objects or substances undergo a change that does not change into a different substance.

45.

Which type of change can be undone?

a)

Chemical

b)

Physical

46.

What happens to the weight of matter when it undergoes chemical changes?

a)

It stays the same

b)

It increases

c)

It decreases

47.

What happens to the weight of matter when it undergoes a physcial change?

a)

It stays the same

b)

It increases

c)

It decreases

48.

If you mix 1 gram of salt with 50 grams of water, how many grams of matter will you have after the salt is completely dissolved?

a)

49 grams

b)

50 grams

c)

51 grams

d)

None of the above

49.

Which are clues that a chemical change has taken place?

a)

Change in temperature

b)

The color changes

c)

The odor or smell changes

d)

Formation of a precipatate

e)

You see bubbles form

50.
Wood burned in a fireplace
a)
Chemical Change
b)
Physical Change
51.
Cake batter baked in an oven
a)
Chemical Change
b)
Physical Change
52.
Baking soda and vinegar combine to make carbon dioxide
a)
Chemical Change
b)
Physical Change
53.
Glass bottle that is shattered
a)
Chemical Change
b)
Physical Change
54.
Copper roof changing color
a)
Chemical Change
b)
Physical Change
55.
Rust on an iron fence
a)
Chemical Change
b)
Physical Change
56.
Shredding a piece of paper
a)
Chemical Change
b)
Physical Change
57.
Boiling water
a)
Chemical Change
b)
Physical Change
58.

What does the number 3 represent in 4NH3?

a)

Subscript

b)

Superscript

c)

Coefficient

59.

What does the number 4 represent in 4NH3?

a)

Subscript

b)

Superscript

c)

Coefficient

60.

How many Nitrogen (N) atoms are in 4NH3?

a)

4

b)

1

c)

3

d)

12

61.

How many Hydrogen (H) atoms are in 4NH3?

a)

4

b)

1

c)

3

d)

12

62.

How many total molecules is 4NH3?

a)

4

b)

1

c)

3

d)

12

63.

How many total atoms make up 4NH3?

a)

4

b)

16

c)

3

d)

12

64.

In the equation shown, what are the reactant(s)?

a)

N2 + H2

b)

NH3

65.

In the equation shown, what are the product(s)?

a)

N2 + H2

b)

NH3

66.

Is this equation balanced?

a)

Yes

b)

No

67.

Is this equation balanced?

a)

Yes

b)

No

68.

Is this equation balanced?

a)

Yes

b)

No

69.

Which reactant is missing from the equation shown?

(What should go in the place of the "X"?)

a)

One hydrogen atom.

b)

Three hydrogen atoms.

c)

Four oxygen atoms.

70.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
71.
The substances listed on the left side of a chemical equation are the
a)
Products
b)
Coefficients
c)
Precipitates
d)
Reactants
72.
The substances listed on the right side of a chemical equation are the
a)
Yields
b)
Reactants
c)
Products
d)
Precipitates
73.
In chemical reactions, what does the principle of conservation of mass mean?
a)
Matter is not created or destroyed.
b)
The total mass of the reactants is greater than the total mass of the products.
c)
The total mass of the reactants is less than the total mass of the products.
d)
Matter is not changed.
74.

Which is the Law of Conservation of Matter?

a)

matter cannot be created or destroyed, it only rearranges

b)

matter can be created but it cannot be destroyed, it never rearranges

c)

matter can be destroyed but it cannot be created, it usually just rearranges

d)

matter is an unproven theory created by Hans Geiger

75.
Which one is an element?
a)
Co
b)
CO
c)
CO2
d)
CO3-2

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