Question

What is meant by matter ? What is an atom ?. What is the smallest unit of matter?​

Answer 1

Matter is anything that has mass and occupy space.
Atom is the building block of matter
Atom is the smallest unit of matter

Answer 2

Explanation:

Anything that can occupy space and have mass is known as matter.

Matter is made of very tiny particles called atom.

Atom is the smallest unit of matter.

hope it helps....................