Question

what is atoms ? please tell me fast it's urgent please .......​

Answer 1

Answer:

Atoms are the basic units of matter and the defining structure of elements. We now know that atoms are made up of three particles: protons, neutrons and electrons — which are composed of even smaller particles, such as quarks. Atoms were created after the Big Bang 13.7 billion years ago.

Answer 2

An atom is the smallest unit of ordinary matter that forms a chemical elements.