Question

explain Quantum Mechanics

Answer 1

Quantum mechanics is very higher related physics/chemistry topic.Even in the XII we discuss it very little.
It's vast field where higher standard physics concepts needed.So you may not understand it this standard.
You will study it on higher standard.
I will give you a small paragraph about it.
Quantum mechanics (QM; also known as quantum physics, quantum theory, the wave mechanical model, or matrix mechanics), including quantum field theory, is a fundamental theory in physics which describes nature at the smallest scales of energy levels of atoms and subatomic particles.