Unit 7: Chemical Reactions

Front

What is a chemical reaction?

Back

A process in which substances (reactants) undergo a transformation to form new substances (products).

Front

What are reactants in a chemical reaction?

Back

The starting materials that undergo change during a chemical reaction.

Front

What are products in a chemical reaction?

Back

The substances that are formed as a result of a chemical reaction.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it remains constant.

Front

What is a balanced chemical equation?

Back

An equation that has the same number of each type of atom on both sides, indicating that mass is conserved.

Front

What are coefficients in a chemical equation?

Back

Numbers placed before compounds in a chemical equation to indicate the number of molecules or moles.

Front

What are subscripts in a chemical formula?

Back

Numbers written below and to the right of an element symbol that indicate the number of atoms of that element in a molecule.

Front

What is an exothermic reaction?

Back

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

Front

What is an endothermic reaction?

Back

A chemical reaction that absorbs energy from its surroundings.

Front

How do you balance a chemical equation?

Back

By adjusting the coefficients of the reactants and products to ensure the same number of each type of atom on both sides.