The questionsgiven belowcontainstatement -1 (Assertion ) andstatement -2 (Reason ) . Ithas fouroptions(a), (b) , ( c) and (d ) out ofwhich ONLYONE iscorrect . Choosethe correctoptionas. Statement - 1 . The elements having 1 s^(2) 2s^(2)2p^(6)3s^(2) and1s^(2)2s^(2) configurationbelongto the samegroup Statement-2 . Bothhave samenumberof electronselectronsin the valenceshell.

The questionsgiven belowcontainstatement -1 (Assertion ) andstatement

1.	The questionsgiven belowcontainstatement -1 (Assertion ) andstatement -2 (Reason ) . Ithas fouroptions(a), (b) , ( c) and (d ) out ofwhich ONLYONE iscorrect . Choosethe correctoptionas. Statement - 1 . The elements having 1 s^(2) 2s^(2)2p^(6)3s^(2) and1s^(2)2s^(2) configurationbelongto the samegroup Statement-2 . Bothhave samenumberof electronselectronsin the valenceshell.
Answer» Statement -1 ISTRUE Statement-2 isTrue, Statement-2 iscorrectexplanationfor Statement -2 Statement -1 isTrueStatement-2 isTrue , Statement-2 is NOTA correctexplanationfor Statement -2 Statement -1 isTrueStatement-2 is False Statement -1 is FalseStatement-2 isTrue Solution :Correctstatement -1 . THEELEMENTWITH E.C`1s^(2)2S^(2)2p^(6)3s^(2) ` belongs to group 2 but theelementwith E.C. `1s^(2)2s^(2)` (i.e.,helium ) is aninertgas andhencebelongsto group 18.