Li Litiy 1s^2 2s^1
N Azot 1s^2 2s^2 2p^3
C Uglerod 1s^2 2s^2 2p^2
Ca Calsiy 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2
Li Litiy 1s^2 2s^1
N Azot 1s^2 2s^2 2p^3
C Uglerod 1s^2 2s^2 2p^2
Ca Calsiy 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2