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Worksheets

chemistry

Total questions: 15

Worksheet time: 7mins

Name
Class
Date
1.

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

a)

1

b)

2

c)

3

d)

4

2.

Ozone and Oxygen molecules are the same substance because they both are made only of oxygen atoms.

a)

true

b)

false

3.

What is the chemical symbol for carbon?

a)

C

b)

Ca

c)

Cn

d)

Crn

4.

Molecules bonded together make up atoms.

a)

true

b)

false

5.

Molecules bonded together make up atoms.

a)

true

b)

false

6.

How many atoms make up one molecule of laughing gas?

a)

1

b)

2

c)

3

d)

4

7.

When we combined vinegar and baking soda and created carbon dioxide what was the product?

a)

vinegar

b)

carbon dioxide and baking soda

c)

carbon dioxide

d)

vinegar and baking soda

8.

In a chemical reaction or change a new substance is not created.

a)

true

b)

false

9.

If there is a rise in temperature during a chemical reaction it is called a _________________ reaction.

a)

endothermic

b)

exothermic

10.

Atoms are mostly made up of...

a)

empty space

b)

electrons

c)

solids and liquids

11.

What did the second man drink?

a)

Arsenic

b)

Hydrogen Peroxide

c)

Helium Oxolate

12.

What is Batman's favorite element?

a)

Na

b)

H

c)

O

d)

Cl

13.
What kind of change is a phase change?
a)
Physical - it's still the same substance
b)
chemical - it's made of chemicals 
14.
A chemical change happens when...
a)
a substance is changed at the atomic level 
b)
bonds are broken and formed 
c)
a new substance is made
d)
all of the above! 
15.
A catalyst  
a)
is added to a reaction to make it slow down 
b)
breaks apart and is changed 
c)
provides an energetic short cut to the products