wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Chemistry 8th grade

Total questions: 34

Worksheet time: 21mins

Name
Class
Date
1.

what is an atom

a)

smallest part of the universe

b)

smallest part of a substance

c)

smallest part of anything

d)

smallest part of water

2.

protons

a)

negative charge, nucleus

b)

positive charge, shells

c)

positive charge , nucleus

d)

neutral charge, nucleus

3.

electrons

a)

no charge, nucleus

b)

positive charge, nucleus

c)

negative charge, shells

d)

negative charge, nucleus

4.

lst shell holds

a)

2

b)

8

c)

18

d)

32

5.

2nd shell holds

a)

2

b)

8

c)

18

d)

32

6.

a charged atom

a)

neutral

b)

isotope

c)

ion

d)

nucleus

7.

How many atoms of sodium (Na) are in one molecule of baking soda?

a)

1

b)

2

c)

3

d)

4

8.

What is the chemical symbol for carbon?

a)

C

b)

Ca

c)

Cn

d)

Crn

9.

Molecules bonded together make up atoms.

a)

true

b)

false

10.

How many atoms make up one molecule of laughing gas?

a)

1

b)

2

c)

3

d)

4

11.

Atoms are mostly made up of...

a)

empty space

b)

electrons

c)

solids and liquids

12.

Pure substance that consists entirely of one type of atom.

a)

Solution

b)

Mixture

c)

Compound

d)

Element

13.

Elements have the most similar properties if they are in the same _______?

a)

Periods

b)

Groups

c)

Rows

d)

Blocks

14.
What is an atom which has gained or last electrons called?
a)
isotope
b)
atom
c)
ion
d)
balanced
15.
Gold is an example of a(n) 
a)
pure element
b)
pure compound
c)
pure mixture
16.
who developed the modern day periodic table of elements?
a)
Darwin
b)
Shultz
c)
Hooke
d)
Mendeleev
17.
What is the octet rule?  How many valence electrons can the first three periods hold?
a)
8
b)
2
c)
2 8 8
d)
2 8 16
18.
Whether or not bonds form is due to the ?????
a)
valence electron configurations
b)
protons
c)
atomic mass
d)
chance
19.
In what type of bond are electrons gained or lost?  This happens between a metal and a non-metal?
a)
ionic
b)
covalent
c)
subatomic
20.
In this type of bond electrons are shared by two non-metals
a)
ionic
b)
covalent
c)
subatomic
21.

What is the name of the element that is Superman's Planet?

a)

Neon

b)

Krypton

c)

Argon

d)

Radon

22.

What is Oxygen and Hydrogen used to make?

a)

Water

b)

Food

c)

Plants

d)

Pizza

23.

How many Electrons are in Hydrogen?

a)

36

b)

1

c)

10

d)

18

24.
Which of the following has a full valence shell?
a)
Oxygen
b)
Neon
c)
Barium
d)
Carbon
25.
An ionic bond forms when atoms ___________ electrons.
a)
gain
b)
share
c)
increase
d)
transfer
26.
Chemical bonds form when atoms
a)
combined nuclei
b)
give up neutrons
c)
gain protons
d)
share or transfer electrons
27.
If an atom loses two electrons what charge will it have?
a)
+ 2
b)
 - 2
c)
+1
d)
-1
28.
If an atom gains one electron what charge will it have?
a)
-2
b)
-1
c)
+1
29.
What is the number of valence electrons for Oxygen?
a)
8
b)
6
c)
2
d)
1
30.
How many valence electrons in this structure?
a)
6
b)
5
c)
4
d)
7
31.
Atoms gain or lose electrons to become stable by satisfying this rule.
a)
Lewis Structure rule
b)
Periodic Law
c)
octet rule
d)
Ionic Law
32.
What is a valence electron?
a)
an electron that is found in the outermost shell of an atom. 
b)
an electron found in the innermost shell of an atom.
c)
an electron found in the middle shell.
33.
How many more valence electrons does Oxygen need to be stable?
a)
6
b)
2
c)
4
d)
It's already stable with 8
34.
Name this compound:   MgS
a)
Sulfur Magnesium
b)
Magnesium Sulfate
c)
Magnesium Sulfur
d)
Magnesium Sulfide

Similar Resources on Wayground

Chemistry

30 questions

Chemistry

quiz

Worksheet

•

6th - 8th Grade

SOL Science review

35 questions

SOL Science review

quiz

Worksheet

•

8th - 9th Grade

The Role of Charge

35 questions

The Role of Charge

quiz

Worksheet

•

8th - 10th Grade

STAAR Survivor - Chemistry

30 questions

STAAR Survivor - Chemistry

quiz

Worksheet

•

8th Grade

Matter Vocab Pre/Post

32 questions

Matter Vocab Pre/Post

quiz

Worksheet

•

6th - 8th Grade

Oil, Fractional Distillation and Hydrocarbons

34 questions

Oil, Fractional Distillation and Hydrocarbons

quiz

Worksheet

•

7th - 10th Grade

Vocabulary : Chemical Reactions

30 questions

Vocabulary : Chemical Reactions

quiz

Worksheet

•

7th - 8th Grade

Elements, Mixtures and Compounds

30 questions

Elements, Mixtures and Compounds

quiz

Worksheet

•

8th Grade