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.
How many neutrons does the element mercury have? The amount of neutrons depends on the mass number that mercury has. Once you do know the mass number, you just subtract the number of protons, 80 (found on the period table) f â¦ rom that number to get the amount of neutrons. *The mass number is not found on the periodic table*