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Considering the elements B, Al, Mg and K , the correct order of their metallic character is

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B > Al > Mg < K
Al > Mg > B > K
Mg > Al > K < B
K > Mg > Al > B

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detailed solution

Correct option is D

B…non metal ; Al, Mg and K …..metals ;Left to right metallic character decreases… Al < Mg ;‘K’ has maximum metallic character in the given elements….First group and fourth period ;K > Mg > Al > B ;

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