Protons, Neutrons and electrons
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.