Unit 3 IPC Chemical Reactions

Front

What is the Law of Conservation of Mass?

Back

It states that matter cannot be created or destroyed.

Front

In a chemical reaction, the number of atoms you begin with must be...

Back

the same as the number of atoms you end with.

Front

What is a sign that a chemical reaction has occurred?

Back

Formation of a gas.

Front

Elements in the same column of the periodic table have the same number of...

Back

Valence Electrons.

Front

How many valence electrons does Phosphorus (P) have?

Back

5.

Front

What is a chemical reaction?

Back

A process where substances (reactants) transform into different substances (products).

Front

What are reactants in a chemical reaction?

Back

The starting materials that undergo change.

Front

What are products in a chemical reaction?

Back

The substances formed as a result of a chemical reaction.

Front

What is an example of a physical change?

Back

Melting ice.

Front

What is an example of a chemical change?

Back

Burning wood.