Atomic Structure

Protons has the relative mass of 1 and the Charge of 0

Neutrons has the relative mass of 1 and the charge of +1

however electrons has the relative mass of 1/1840 and the charge of -1

* when talking about the charge make sure you mention the negative and positive.

* the relative mass of electrons differ ... some teachers say it's 1/2000 ?

The First Shell has 2

Second Shell has 8

Third Shell has 18

Fourth Shell has 32

* They have changed it from Gcse when it used to be 2,8,8.