Chemical Reactions

Front

What is a chemical reaction?

Back

A process where substances (reactants) are transformed into new substances (products) with different properties.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; the total mass of reactants equals the total mass of products.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

Give an example of a physical change.

Back

Freezing water into ice.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

Give an example of a chemical change.

Back

Burning wood.

Front

What are reactants?

Back

Substances that undergo a chemical change in a reaction.

Front

What are products?

Back

Substances that are formed as a result of a chemical reaction.

Front

What is an atom?

Back

The smallest unit of an element that retains the properties of that element.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.