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Chemistry 2 Review

Total questions: 52

Worksheet time: 53mins

Name
Class
Date
1.

What is the atomic # of iron?

a)

55

b)

56

c)

26

d)

2

2.

How many protons does krypton have?

a)

84

b)

36

c)

48

d)

8

3.

An electron has what charge?

a)

Positive

b)

Negative

c)

It has no charge (it is neutral)

4.

A proton has what charge?

a)

Positive

b)

Negative

c)

It has no charge (it is neutral)

5.

A neutron has what charge?

a)

Positive

b)

Negative

c)

It has no charge (it is neutral)

6.

How many electrons does oxygen have?

a)

8

b)

16

c)

2

d)

15

7.

What is the atomic number of silicon?

a)

14

b)

28

c)

42

d)

7

8.

What is the symbol for arsenic?

a)

A

b)

As

c)

33

d)

75

9.

How many neutrons does beryllium have?

a)

4

b)

5

c)

9

d)

13

10.

Which particles are found in the nucleus of an atom?

a)

protons only

b)

neutrons only

c)

protons & electrons

d)

protons & neutrons

11.

How do you find the number of neutrons in an atom?

a)

It's the same as the atomic #

b)

It's the same as the mass number

c)

Subtract the atomic # from the mass number

d)

Add the mass number and the atomic #

12.
Which element is found  in group 17 period 3?
a)
Chlorine
b)
Flourine
c)
Oxygen
d)
Phosphorous
13.
Which element is found in group 18 period 4?
a)
Neon (Ne)
b)
Chlorine (Cl)
c)
Krypton (Kr)
d)
Xenon (Xe)
14.

These elements are in a:

a)

group

b)

period

15.

These elements are in a:

a)

group

b)

period

16.
A molecule is made up of ____ or more atoms.
a)
1
b)
2
c)
3
d)
4
17.

What is being shown in this image?

a)

Single Atoms (Element)

b)

Compound Molecule

c)

Elemental molecule

d)

Mixture

18.

Match the following

a)

a molecule made of at least two different elements in a fixed ratio

1.

compound

b)

a group of two or more atoms bonded together

2.

molecule

c)

simplest form of matter

3.

element

d)

elements and compounds

4.

pure substances

e)

two or more substances NOT chemically combined

5.

mixture

19.

What is a compound?

a)

Two different elements bonded together.

b)

Two of the same elements bonded together.

c)

A mixture of different substances.

d)

Two substances stuck together with glue.

20.

Which of the following is NOT a compound molecule?

a)

HCl

b)

Cl

c)

NaCl

d)

CO2

21.
Ice melting
a)
Chemical Change
b)
Physical Change
22.
Water freezing
a)
Chemical Change
b)
Physical Change
23.
Wood burned in a fireplace
a)
Chemical Change
b)
Physical Change
24.
Cake batter baked in an oven
a)
Chemical Change
b)
Physical Change
25.
Baking soda and vinegar combine to make carbon dioxide
a)
Chemical Change
b)
Physical Change
26.

Two clear liquids are mixed together in a test tube. A cloudy white solid appears. This substance is called ___.

a)

a change in state.

b)

a precipitate.

c)

a reactant.

d)

malleable.

27.

A chemical change always results in...

a)

a release of heat

b)

a gas being formed

c)

a color change

d)

a new substance being formed

28.

The formation of a solid when two liquids combine is called?

a)

Solidification

b)

Freezing

c)

Precipitate

d)

Solubility

29.

If the chemical properties of a substance remain unchanged & the appearance or shape of an substance changes it is a...

a)

Chemical Change

b)

Physical Change

c)

Both a physical and chemical change.

d)

Neither a physical or chemical change.

30.

Which type of change are irreversible?

a)

Chemical Changes

b)

Physical Changes

c)

Changes in State

d)

Changes in Temperature

31.

During Chemical Reactions, the substances that are used are called?

a)

Precipitate

b)

Corrosion

c)

Reactants

d)

Products

32.

During Chemical Reactions, the new substances created are called?

a)

Precipitate

b)

Corrosion

c)

Reactants

d)

Products

33.

Choose the best description below for the image

a)

physical change

b)

chemical change

34.

Choose the best description below for the image

a)

physical change

b)

chemical change

35.

Choose the best description below for the image

a)

physical change

b)

chemical change

36.

Did a chemical change take place?

a)

yes

b)

no

37.

Did a chemical change take place?

a)

yes

b)

no

38.

Which of the following chemical formulas represents a compound?

a)

C

b)

O2

c)

CH3CHO

d)

H2

39.
Which statement best describes an element?
a)
made from mixture 
b)
thousands in the world
c)
pure, made of only one atom
d)
can be separated 
40.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
41.
What is the picture displayed?
a)
atom
b)
element
c)
molecule
d)
compound
42.

This diagram represents...

a)

An element

b)

A molecule

c)

A compound

d)

A mixture of elements and compounds

43.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
44.

The picture shows a model of a helium atom and a lithium atom. Which of the following statements is true about the lithium and helium atoms?

a)

Helium has more protons, neutrons, and electrons.

b)

Lithium is much smaller than helium.

c)

There is no difference between helium and lithium.

d)

Lithium has more protons, neutrons, and electrons

45.

Neutrons are neutral. This means that

a)

neutrons are not involved in chemical reactions.

b)

neutrons do not have a charge.

c)

neutrons do not have mass

d)

neutrons are neither acidic or basic.

46.

A copper wire is made of copper (Cu) atoms. Which of the following best describes the copper atoms?

a)

They would be mostly the same, but some would have more protons than others.

b)

They are all basically the same, but the number of neutrons could vary.

c)

They are all exactly the same.

d)

They each have different numbers of protons, neutrons, and electrons.

47.

Which of these is the part of an atom that contains the protons and neutrons?

a)

shell

b)

nucleus

c)

orbital

d)

electron

48.
Which is an electron?
a)
A
b)
B
c)
C
49.

The number of protons in an atom is called the .....

a)

Mass

b)

Atomic Number

c)

Nucleus

d)

Orbital

50.

The mass number of an atom is the mass of ______ + _____

a)

protons + neutrons

b)

protons + electrons

c)

neutrons + nucleus

d)

protons + nucleus

51.

What is the CHEMICAL SYMBOL in this element tile?

a)

10

b)

Ne

c)

Neon

d)

20.18

52.
How many protons are in this element?
a)
79
b)
196
c)
117
d)
Cannot be determined

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