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Composition of Matter

Total questions: 30

Worksheet time: 16mins

Name
Class
Date
1.

All matter is made of tiny particles called ___________.

a)

atoms

b)

elements

c)

compounds

d)

mixtures

2.

____________, _____________, and _______________ are the three subatomic particles.

a)

neutrons

b)

protons

c)

atoms

d)

elements

e)

electrons

3.

____________ have a positive charge.

a)

electrons

b)

neutrons

c)

protons

d)

atoms

4.

Neutrons have a _________ charge.

a)

positive

b)

negative

c)

neutral

5.

_______________ are negatively charged particles in an atom.

a)

neutrons

b)

electrons

c)

protons

6.

If an element from the periodic table has 5 protons, what is it's atomic number?

a)

10

b)

5

c)

7

d)

15

7.

What element has 1 electron?

a)

helium

b)

oxygen

c)

nitrogen

d)

hydrogen

8.

What is the chemical symbol for Oxygen?

a)

Oxygen

b)

8

c)

O

d)

16

9.

This diagram represents a _____.

a)

compound

b)

mixture

c)

element

10.
This picture represents which of the following?
a)
Element
b)
Compound
c)
Mixture
11.
NaHCO3 is an example of —
a)
an abbreviation
b)
a compound
c)
a mixture
d)
an element
12.

How many atoms are in a molecule of caffeine?

a)

4

b)

24

c)

8

d)

16

13.

How many atoms are in a molecule of water?

a)

1

b)

2

c)

3

d)

4

14.

How many elements are in a molecule of water?

a)

1

b)

2

c)

3

d)

4

15.

Which is an Element

a)

NaCl

b)

H2O

c)

Sn

d)

NaOH

16.

Which is a compound?

a)

NaOH

b)

Fe

c)

N

d)

He

17.

Why is the overall charge of an atom neutral (0)?

a)

They have the same number of protons and neutrons.

b)

They have the same number of protons and electrons.

c)

They have the same number of electrons and neutrons.

18.

Which TWO of the following subatomic particles are inside the nucleus?

a)

protons

b)

electrons

c)

neutrons

d)

There are no subatomic particles in the nucleus of an atom.

19.
If an atom has 3 electrons, how many protons does it have?
a)
1
b)
2
c)
4
d)
3
20.
What is the mass number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
21.

A molecule is created when the same _________ is bonded together. For example: C10

a)

Element

b)

Compound

c)

Mixture

22.
a)

Element

b)

Compound

c)

Mixture

23.
a)

Element

b)

Compound

c)

Mixture

24.

a)

Element

b)

Compound

c)

Mixture

25.

a)

Elements

b)

Mixture

c)

Compound

26.

a)

element

b)

compound

c)

mixture

27.

a)

element

b)

compound

c)

mixture

28.

a)

element

b)

compound

c)

mixture

29.

a)

element

b)

compound

c)

mixture

30.
a)

element

b)

compound

c)

mixture

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