Unit 1 Matter: Properties and Change Review

Which chemical equation best represents the Law of Conservation of Mass?

• H + O --> H2O

• 2H2 + O2 --> 2H2O

• H2 + O2 --> H2O

• H2 + O2 --> 2H2O2

The molecular formula for salt is:

• H2O

• NaCl

• CO2

• HCl

Electrons in the outermost energy level are called:

• Neutrons

• Nucleus

• Protons

• Valence Electrons

Which is the best example of a chemical change?

• Butter Melting

• Paper Tearing

• Water Evaporating

• Egg Cooking

How many electrons does Sodium (Na) have?

• 23

• 22

• 12

• 11

The nucleus has:

• Protons and Electrons

• Protons and Neutrons

• Electrons and Neutrons

• Electrons

Flammability is a:

• Chemical Property

• Physical Property

• Both Chemical and Physical Property

• None of the Above

What is classified as an element?

• Carbon Dioxide

• Vinegar

• Iron

• Water

Color is a:

• Chemical Property

• Physical Property

• Both Chemical and Physical Property

• None of the above

In H2COCH2, how many hydrogen (H) are there?

• 1

• 2

• 3

• 4