Question

Complete the following sentence.
An ______ is the smallest particle of an element that can take part in a chemical reaction.

Answer 1

Atoms:-

1. According to Avagadro, an atom was defined as the smallest particle of an element that takes part in a chemical reaction.
2. Atoms may or may not exist independently.

Final answer:- An atom is the smallest particle of an element that can take part in a chemical reaction.