Electron

=**Electrons** =

**Basic Facts**
 Electons are subatomic particles with a negative electricity charge **. ** Its composition is an elementary particle, and was discovered by J. J. Thompson. Its mass is 1/1836 that of a proton. The amount of electrons an atom has is equivalent to it's number of protons, which is typically equivalent to the atoms' atomic number. Its intrinsic angular momentum of the electron is half-integer value in units of H, which means thats its a fermion.

An electron is a negatively charged component ofan __ [|atom] __. Electrons exist outside of and surrounding the __ [|atom] __ nucleus. Each electron carries one unit of negative charge and has a very small __ [|mass] __ as compared with that of a __ [|neutron] __ or __ [|proton] __.



**Charateristics**
Electrons belong to the group of subatomic particles called leptons, which are believed to be fundamental or elementary particles. Electrons have the lowest mass of any charged lepton and belong to the first generation of fundamental particles, and does not belong to the second or third generation of leptons. Leptons differ from other basic constituent of matter, the quarks, by their lack of strong interaction. All members of the lepton group are fermions, because they all have half-odd integer spin; the electron has spin of 1/2.