What is the lightest particle in the following 1)electron 2)proton 3)neutron 4)photon

1) Electron

Explanation:

It carries a negative charge of 1.602176634 × 10−19 coulomb, which is considered the basic unit of electric charge. The rest mass of the electron is 9.1093837015 × 10−31 kg, which is only 1/1,836the mass of a proton.

neutrons are in the middle of the atom and the electrons, which are much smaller.

1. they vary with a higher number because boiling is way hotter than melting