Question

1. which of the following correctly explains how atoms can be used to indicate a chemical reaction occurs?

atoms rearrange and form new structures during a chemical reaction.
the number of atoms increases during a chemical reaction.
the number of atoms decreases during a chemical reaction.
new atoms are created during a chemical reaction.

Explanation:

In a chemical reaction, atoms are rearranged to form new substances. The law of conservation of mass states that atoms are neither created nor destroyed in a chemical reaction, so the number of atoms remains constant.

Answer:

Atoms rearrange and form new structures during a chemical reaction.