Question

A combination reaction is when two or more _____ combine to form one product. A decomposition reaction is when a substance breaks down into two or more simpler substances in a chemical reaction.

Answer 1

elements

Step-by-step explanation:

Answer 2

Reactants

Step-by-step explanation:

A combination reaction is usually defined as a type of chemical reaction in which two or more reactants are fused together to form a single product. For example, The two elements Hydrogen and Chlorine are linked together to form Hydrochloric acid.

This can be written as,

H + Cl -----> HCl (acid)

A decomposition reaction is usually defined as a type of chemical reaction in which a single and complex substance is disintegrated into two or more simple substances. For example, the same above reaction can be disintegrated into-

HCl (acid) ------> H + Cl