Science L4 Chemical Reactions

Mass is neither _______ nor _______ in a chemical reaction.

• created, destroyed

• created, restructured

The mass of an element at the beginning of the reaction will equal the mass of that element at the end of the reaction.

• True

• False

What is a property of a soild?

• Rigid

• Changes shape

• Molecules are far apart

What is a property of a liquid?

• It holds the shape of the container

• It is rigid in structure

• It can hold its own shape

What is a property of a gas?

• The molecules are far apart

• It will hold its own shape

• It has no ability to change

What can a chemical reaction rearrange in a substance?

• The molecular structure

• The atomic shape

What are the 5 possible indicators of a chemical reaction?

• Change in color, shape, smell, precipitate and gas production.

• Change in color, smell, precipitate formed, gas production and heat change.

What is the force called that holds molecules together?

• Bond

• Bridge

• Connection

Reactant

• A substance that changes during a chemical reaction

• A substance that does not change during a chemical reaction

• A substance that increases in mass during a chemical reaction

Product

• A new substance that is formed during a chemical reaction

• A new substance that absorbs all the other molecules during a chemical reaction

• A new substance that decreases in mass during a chemical reaction