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chemistry unit review

Total questions: 82

Worksheet time: 1hrs 22mins

Name
Class
Date
1.
a)

Periods

b)

Groups

2.
a)
Periods
b)
Groups
3.

a)

the number of energy levels

b)

the number of valence electrons

c)

the same number of protons

d)

the same number of neutrons

4.

a)

the number of energy levels

b)

the number of valence (outside) electrons

c)

the same number of protons

d)

the same number of neutrons

5.
a)
Same group
b)
Same period
6.
a)
Metals
b)
Nonmetals
c)
Metalloids
7.
a)
Metals
b)
Nonmetals
c)
Metalloids
8.
a)
Metals
b)
Nonmetals
c)
Metalloids
9.
a)
Metals
b)
Nonmetals
c)
Metalloids
10.
a)
Metals
b)
Nonmetals
c)
Metalloids
11.
a)
Metals
b)
Nonmetals
c)
Metalloids
12.
In the modern periodic table elements are arranged by:
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
13.

What is the mass of a proton?

a)

0

b)

1 amu

c)

2 amu

d)

1 gram

14.

What is the mass of a neutron?

a)

0

b)

1 amu

c)

2 amu

d)

1 gram

15.

What is the mass of an electron?

a)

0

b)

1 amu

c)

2 amu

d)

1 gram

16.

What is the electrical charge of a proton?

a)

Positive +

b)

Negative -

c)

Neutral

17.

What is the electrical charge of an electron?

a)

Positive +

b)

Negative -

c)

Neutral

18.

What is the electrical charge of a neutron?

a)

Positive +

b)

Negative -

c)

Neutral

19.

Which subatomic particles are located in the nucleus of an atom?

a)

Protons

b)

Neutrons

c)

Electrons

20.

Which subatomic particles are located outside the nucleus of an atom?

a)

Protons

b)

Neutrons

c)

Electrons

21.

Write the element symbol for the element that has an atomic number of 26.

(a)  

22.

Write the element symbol for the element that has a mass number of 20.

(a)  

23.

What is the atomic number for Magnesium (Mg)?

Hint: check group 2 on the periodic table

a)

2

b)

24

c)

12

d)

44

24.

What is the rounded atomic mass for Helium?

Hint: Check group 18 on the periodic table

a)

2

b)

4

c)

3

d)

7

25.

What is the rounded atomic mass for Lithium?

Hint: #3 on the periodic table

a)

3

b)

6

c)

7

d)

2

26.

How many protons does a zinc atom have?

Hint: #30 on the periodic table

a)

65

b)

30

c)

35

27.

How many neutrons does a zinc atom have?

Hint: #30 on the periodic table

a)

65

b)

30

c)

35

28.

How many electrons does a zinc atom have?

Hint: #30 on the period table

a)

65

b)

30

c)

35

29.

What element is in group 2, period 3?

a)

Ca

b)

Mg

c)

Na

30.

What element is in group 6, period 4?

a)

Cr

b)

Sg

c)

Zr

31.

What element is in group 2 that has more protons than Barium?

(a)  

32.

What element is in group16 and has 16 neutrons?

(a)  

33.

What element is in period 3 and has a smaller mass than Magnesium?

(a)  

34.

What is the largest atom in group 1?

a)

He

b)

Fr

c)

H

35.

What is the largest atom in Period 1?

a)

He

b)

Fr

c)

H

36.

What group is Arsenic in?

Hint: #33 on periodic table

(a)  

37.

What period is Arsenic in?

Hint: #33 on the periodic table

(a)  

38.

How many energy levels of electrons (layers) does a Krypton atom have?

(Kr is #36 on the periodic table)

a)

18

b)

8

c)

4

d)

36

39.

The mass number minus the atomic number tells us the number of which subatomic particles in each atom of an element?

M-A=?

a)

Protons

b)

Neutrons

c)

Electrons

40.

Burning wood is a

a)

chemical change

b)

physical change

41.

Melting butter for popcorn is a

a)

chemical change

b)

physical change

42.

Broken glass is a

a)

chemical change

b)

physical change

43.

A change in the size, shape, or state of matter.

a)

chemical change

b)

physical change

44.

A change in which NEW substances are formed.

a)

Chemical change

b)

Physical change

45.

Salt dissolved in water is a

a)

physical change

b)

chemical change

46.

Rust on a bike is an example of chemical change.

a)

True

b)

False

47.
Which Law states that Matter cannot be created or destroyed during a Chemical Change/Reaction?
a)
Conservation of Energy
b)
Conservation of Matter (Mass)
c)
Conservation of Momentum
d)
Conservation of Thermodynamics
48.
Water freezing into ice is an example of a...
a)
Physical Change
b)
Chemical Change
49.
What are the products of the chemical reaction pictured?
a)
CH4 and CO2
b)
CH4 and O2
c)
CO2 and H2O
d)
O2 and H2O
50.
Consider the chemical equation CH4 + 2 O2 → CO2 + 2 H2O. In this equation, CH4 is a
a)
product
b)
reactant
c)
displacement
51.
2H2 + O2 ----> 2H2O What is the product?
a)
------>
b)
2H2O
c)
2H2+ O2
52.

Rotting fruit produces a bad smell. This happens because the fruit is experiencing a

a)

physical change

b)

chemical change

53.
Physical or Chemical Change?  Sodium metal burning in water.
a)
Physical Change
b)
Chemical Change
54.
Physical or Chemical Change?  Making a paper airplane.
a)
Physical Change
b)
Chemical Change
55.

The chart below lists some substances and their symbols. How many of these substances are examples of elements?

a)

1

b)

2

c)

3

d)

4

56.

In the diagrams provided, the circles of different colors represent the atoms of different elements. Which diagram represents a mixture?

a)

I

b)

II

c)

III

d)

IV

57.
Contains only one kind of atom.
a)
Element
b)
Compund
c)
Mixture
58.
Contains two or more atoms combined
a)
Elements
b)
Compounds
c)
Mixtures
59.
Is sugar (C12H22O11) an element or a compound?
a)
Element
b)
Compound
60.
What is H2SO4 
 made up of?
a)
2 hydrogen, 1 sulfur, 4 oxygen
b)
1 hydrogen, 2 sulfur, 4 oxygen
c)
2 hydrogen & 4 sodium
d)
1 hydrogen & 6 sodium
61.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
62.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Elements and Compounds
d)
Mixture of Elements
63.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Elements & Compounds
d)
Mixture of Compounds
64.
Classify the picture with the correct label.
a)
Compounds
b)
Mixture of Elements
c)
Mixture of Compounds
d)
Mixture of Elements & Compounds
65.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Compounds
d)
Mixture of Elements
66.

This picture is a model of...

a)

an element

b)

a compound

c)

a homogenious mixture

d)

a heterogeneous mixture.

67.
a)
Element
b)
Compound
c)
Mixture of compound and element
d)
Mixture of elements
68.
Mixtures are __________ combined.
a)
Chemically
b)
Physically
c)
Magically
d)
Spontaneously
69.
These must be separated chemically. 
a)
elements 
b)
compounds 
c)
mixtures 
d)
homogeneous mixtures 
70.
This can be separated physically. 
a)
mixture 
b)
element 
c)
compound 
71.

The formula for baking soda is NaHCO3. How many elements make up this compound?

a)

5

b)

4

c)

3

d)

6

72.

The formula for baking soda is NaHCO3. How many atoms make up this compound?

a)

3

b)

4

c)

5

d)

6

73.

The formula for baking soda is NaHCO3. How many atoms of Hydrogen are in this compound?

a)

1

b)

0

c)

3

d)

6

74.

Neutral solutions have a pH of

a)

pH of 2

b)

pH of 0

c)

pH of 7

d)

A neutral solution does not have a pH

75.
Tastes Sour
a)
Acids
b)
Bases
c)
Salts
d)
All
76.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
77.
Which solution releases H+ in solution?
a)
Base
b)
Acid
c)
Buffer
d)
Water
78.
This substance releases OH- into solution
a)
Acid
b)
Base
c)
Neutral
79.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
80.

Which is NOT a property of a base?

a)

Tastes sour

b)

Slippery

c)

Bitter taste

d)

Turns red litmus to blue

81.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
82.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-5
d)
1-20

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