write the electronic configuration of first 20 elements of modern periodic table.
element electronic configuration
- hydrogen ( H)= 1
- helium (He) = 2
- lithium (Li) = 2,1
- beryllium (Be)= 2,2
- boron (B) = 2,3
- carbon ( C) = 2,4
- nitrogen (N) = 2,5
- oxygen ( O) = 2,6
- fluorine (F) = 2,7
- neon (Ne) = 2,8 (stable)(noble gas)
- sodium(Na)= 2,8,1
- magnesium(Mg) = 2,8 ,2
- aluminium (Al) = 2,8,3
- silicon (Si) = 2,8,4
- phosphorous(P) = 2,8,5
- sulphur (S) = 2,8,6
- chlorine (Cl) = 2,8,7
- argon (Ar) = 2,8,8(stable)(noble gas)
- potassium (K)= 2,8,8,1
- calcium (Ca) = 2,8,8,2