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Worksheets

Elements Molecules Compounds

Total questions: 15

Worksheet time: 15mins

Name
Class
Date
1.

Is this an element, compound, or molecule
Be6

a)

Element

b)

Compound

c)

Molecule

2.

Two oxygen atoms bond together, which vocabulary word best describes this type of matter?

a)

molecule

b)

compound

c)

element

d)

atom

3.

H2O is most accurately described as a ___________________.

a)

molecule

b)

compound

c)

element

d)

atom

4.

Which of the following is the most accurate statement?

a)

everything is both a molecule and a compound

b)

nothing can be both a molecule and a compound

c)

all compounds are also molecules

d)

All molecules are also compounds

5.

Which vocabulary words can be used to describe this image? (check all that apply)

a)

molecule

b)

compound

c)

element

d)

atom

6.

Oxygen, Nitrogen, Hydrogen, and Calcium are all examples of ______________________.

a)

molecules

b)

compounds

c)

atoms

d)

elements

7.

What is a substance with unique physical and chemical properties that can't be reduced by chemical means.

a)

an element

b)

an atom

c)

a molecule

d)

a compound

8.

Molecules and compounds are created when multiple atoms bond together, but how are they different?

a)

Compounds have to have atoms from different elements bonded together

b)

Molecules have to have atoms from different elements bonded together

c)

They are the same and there is no difference

d)

Molecules are building blocks of compounds

9.

Which of these models can be described as a compound?

a)

water

b)

carbon dioxide

c)

amonia

d)

methane

e)

All of them are compounds

10.

What is a small particle that is known as the basic building block of matter?

a)

molecule

b)

compound

c)

element

d)

atom

11.

Which one of the following is a compound?

a)

NaCl

b)

O2

c)

Hydrogen

d)

He2

12.

What type of model is pictured here?

a)

space filling model

b)

ball and stick model

13.

Which of the following is a molecule but not a compound?

a)

O2O_2

b)

H2OH_2O

c)

NaClNaCl

d)

CO2CO_2

14.

What is the smallest unit of a compound that retains its chemical properties?

a)

An atom

b)

A molecule

c)

An element

d)

A mixture

15.

Which of the following statements is true about elements, molecules, and compounds?

a)

All molecules are compounds

b)

All compounds are molecules

c)

Elements are made of compounds

d)

Compounds cannot be broken down into elements