Elements a,b,c and d have the following electronic configurations:a:1s^(2),2s^(2),2p^(6)b:1s^(2),2s^(2),2p^(6),3s^(2),3p^(1)c:1s^(2),2s^(2),2p^(6),3s^(2),3p^(6) d:1s^(2),2s^(2),2s^(1)Which elements among these will belong to the same group of periodic table.

Elements a,b,c and d have the following electronic configurations:a:1s

1.	Elements a,b,c and d have the following electronic configurations:a:1s^(2),2s^(2),2p^(6)b:1s^(2),2s^(2),2p^(6),3s^(2),3p^(1)c:1s^(2),2s^(2),2p^(6),3s^(2),3p^(6) d:1s^(2),2s^(2),2s^(1)Which elements among these will belong to the same group of periodic table.
Answer» Solution : In the above elements, NE and Ar belong to same group (NOBLE gases - 18H group). Al and B belong to the same group (13H group).