Question

value: 3
a ____ is said to have occurred when bonds between atoms are formed or broken.

a. chemical reaction

b. physical reaction

c. nuclear reaction

d. ionic reaction

Explanation:

A chemical reaction is defined as a process where chemical bonds between atoms are broken and new bonds are formed, resulting in new substances. A physical reaction (option b) involves changes in physical properties without bond changes. A nuclear reaction (option c) involves changes in the atomic nucleus, not just atom - atom bonds. An ionic reaction (option d) is a type of chemical reaction, but the general term for bond - forming or - breaking is chemical reaction. So the correct option is a.

Answer:

a. chemical reaction