In each of thefollowingquestionsa Statementof Assertion(A ) isgivenfollowedby acorrespondingstatementof Reason(R ) Justbelow it . Of thestatementmarkthe correctanswer asAssertion .Heliumand beryllimhave similarouterelectronicconfigurationof the typens^(2) Reason . both arechemciallyinert .

In each of thefollowingquestionsa Statementof Assertion(A ) isgivenfol

1.	In each of thefollowingquestionsa Statementof Assertion(A ) isgivenfollowedby acorrespondingstatementof Reason(R ) Justbelow it . Of thestatementmarkthe correctanswer asAssertion .Heliumand beryllimhave similarouterelectronicconfigurationof the typens^(2) Reason . both arechemciallyinert .
Answer» Statement -1 isTrue Statement-2 isTrue, Statement-2 iscorrectexplanationfor Statement -5 If bothassertionand reasonare truebutreasonis NOTTHE trueexplanation of theassertion If assertion is truebut REASONIS false If bothassertionand reasonare false Solution :Correctreason.AlthoughHe and Behavesimilar outerelectronicconfigurationof the TYPE `ns^(2)` ONLYHE `(1s^(2))`has inertgas configurationand henceis chemicallyinertbut Be `(1s^(2)2S^(2))`does nothaveinertgas configurationand henceis notchemicallyinert.