Question

1. a chemical reaction occurs when substances interact and their atoms ______. a. disappear. b. change their size. c. become new atoms. d. rearrange

Explanation:

In a chemical reaction, atoms are conserved (they don't disappear, change size, or become new atoms as per the law of conservation of mass). Instead, atoms rearrange to form new substances. So the correct option is D.

Answer:

D. rearrange