Chemical Reactions

Front

What happens to atoms in a chemical reaction?

Back

They rearrange.

Front

When chemicals react, do the atoms become different atoms?

Back

False

Front

What happens to atoms when they burn?

Back

They all rearrange to form new substances.

Front

Which of the following is NOT a description of an Endothermic reaction?

Back

Energy is released.

Front

If the mass of one reactant of a chemical reaction was 32 grams and the mass of the second reactant was 8 grams, what would be the mass of the products?

Back

40 grams.

Front

What is a chemical reaction?

Back

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

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed.

Front

What is an exothermic reaction?

Back

A reaction that releases energy, usually in the form of heat.

Front

What is an endothermic reaction?

Back

A reaction that absorbs energy from its surroundings.

Front

What are reactants?

Back

Substances that undergo a chemical change in a reaction.