GENERAL KNOWLEDGE

Detailed explanation-1: -Atom is also defined as the smallest particle of an element that retains all the properties of an element.

Detailed explanation-2: -The smallest unit of an element that retains all of the properties of that element is an atom. Atoms themselves contain many subatomic particles, the three most important of which are protons, neutrons, and electrons.

Detailed explanation-3: -Electrons are the smallest of these particles. Protons, neutrons, and electrons are all called particles. Empty space in atoms. The particles that make up an atom are very small.

Detailed explanation-4: -The smallest particle of an element is called an atom.