The Charge of Particles

  1. A neutral atom contains the same number of electrons as the protons. 
  2. The positive and negative charges of the protons and electrons respectively neutralise each other, for example, (+4) + (-4) = 0
  3. If the number of protons is greater than the number of electron, the particle is positively charge.
  4. If the number of protons is greater than the number of electron, the particle is positively charge.
Example:
Number of proton Number of electron
Charge
3
3
0
5
2
+3
9
10
-1
11
10
+3
16
18
-2
17
18
-1
20
18
+3