An atom has the electronic configuration of 1s^2 , 2s62 2p^6 , 3s^2 3p^6 3d^10 , 4s^2 4p^5. Its atomic weight is 80 . Its atomic number and the number of neutrons in its nucleus shall be 2s62 2p^6 3s2 3p6 3d10 4s^2 4p^5. Its atomic weight is 80 . Its atomic number and the [...]
