Electron shell diagram for every element up to calcium. Step through the elements one at a time to watch the shells fill by the 2,8,8 rule. The outer shell tells you the group, and electrons can be added or removed to form ions.
Electron shell diagram for every element up to calcium. Step through the elements one at a time to watch the shells fill by the 2,8,8 rule. The outer shell tells you the group, and electrons can be added or removed to form ions.