Question

What is electron ............​

Answer 1

$\bold{ANSWER}$

Electrons are negatively charged particles that surround the atoms nucleus. It can either be free or bound to the nucleus of an atom. 

• They (electrons) determine the properties of an atom.

Answer 2

Electron is a subunit of atom which is negatively charged. Atom earlier was said indivisible but after later on observations electron, proton and neutron i.e. the subunits of electrons were discovered.