Question

question 5 of 10
which of the following describes a chemical reaction?

a. substances change shape but not properties.

b. molecules mix without interacting.

c. molecules interact without bonds breaking.

d. atoms in substances react with each other.

Explanation:

A chemical reaction involves the rearrangement of atoms, where bonds break and form, leading to new substances. Option A describes a physical change (shape change, no property change). Option B is a mixture (no interaction, so no reaction). Option C: if bonds don't break, it's not a chemical reaction (chemical reactions involve bond breaking/forming). Option D: Atoms reacting with each other means bonds are breaking/forming, creating new substances, which is a chemical reaction.

Answer:

D. Atoms in substances react with each other.