Each electron in an atom is in an energy level,they can be represented as shells.
It has only two on the first shell,then eight,then eight again. 2,8,8
Elements in the same group of the periodic table have the same number of electrons in the outer shell.Group 1 has one electron on its outer enery level.
Group 1 elements react quickly with water and with oxygen.
The noble gases are stable.
Comments
No comments have yet been made