Amongthe elements B, Mg , A1 and Kthe correctorder ofincreasingmetalli

1.	Amongthe elements B, Mg , A1 and Kthe correctorder ofincreasingmetalliccharacter is
Answer» `B LT A1lt Mg lt K` `B lt Mg lt A1 lt K` `K lt Mg lt A1 lt B` `Mg lt A1 lt B lt K` Solution :Electronegativitydecreasesand hencethe METALLIC characterincreaseswithina groupfromtop tobottom (i.e.,A1 ismore metallicthan B ) .Further , electronegativityincreasesand hencethe metalliccharacterdecreasesfrom leftto rightalong aperiod(i.e.,metalliccharacterdecreasesin the order : `K gt Mg gt A1)`. Thusthe overallmetalliccharacterof the fourelementsincreasesin the order: `B lt A1 lt Mg lt K ,` i.e.,OPTION ( a) iscorrect.

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