Part 2 Study Guide

Front

What is the primary force that holds the nucleus of an atom together?

Back

Strong nuclear force.

Front

What does the law of conservation of mass state in a chemical reaction?

Back

Mass is neither created nor destroyed.

Front

Why are hydrocarbons considered non-polar molecules?

Back

They have a uniform distribution of charge.

Front

What is the purpose of a catalyst in a chemical reaction?

Back

To speed up the reaction.

Front

What is the term for a solid turning directly into a gas without passing through the liquid state?

Back

Sublimation.

Front

What is the electromagnetic force?

Back

A fundamental force that causes interactions between charged particles.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance without changing its identity, while a chemical change results in the formation of new substances.

Front

What is an example of a chemical reaction?

Back

Combustion of gasoline in an engine.

Front

What is the role of reactants in a chemical reaction?

Back

Reactants are the starting substances that undergo change during the reaction.

Front

What is the definition of a molecule?

Back

A molecule is a group of two or more atoms bonded together.