One evening last summer, as I strolled along the promenade in Limbe, a small, scenic port town in southwestern Cameroon, I was stopped by a well-dressed young man who greeted me warmly and took me by the hand.
Phosphorus has 3 shells. The outer shell contains 5 electrons. The electronic configuration is :- <br /> 1s2, 2s2, 2p6, 3s2, 3p3.
The atomic number of an atom in the ground state is the same as the atomic number. So, sodium should contain 11 electrons in its electron configuration and magnesium should contain 12 electrons in its electron configuration. Each atom occupies an orbital in a certain order.