Chemistry

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

• 1

• 2

• 3

• 4

How many atoms make up one molecule of N2O?

• 1

• 2

• 3

• 4

Label the correct subatomic particles

a

b

c

neutron

electron

proton

Identify which are the products and reactants

a

b

products

reactants

The Law of Conservation of Mass states that

• compounds and elements are the same

• elements can be destroyed

• matter cannot be created or destroyed, but can be transformed

• mass is the same for all the objects if they need to exist

This change is a

• chemical reaction

• physical change

• musical change

• Ice Ice baby

How is a chemical change different from a physical change?

• there is no difference

• a physical change creates a new substance

• a chemical change creates a new substance

Is burning wood a chemical or physical change?

• chemical
• physical

A white tablet is dropped into water. The water becomes cloudy and bubbles are produced. What type of change has occurred?

• Physical change

• Chemical change

• No change

What does a represent?

• Proton

• Neutron

• Electron