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

(a) B > Al > Mg > K 

(b) Al > Mg > B > K 

(c) Mg > Al > K > B 

(d) K > Mg > Al > B 

1 Answer

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The metallic character of elements decreases from left to right across a period. Thus, the metallic character of Mg is more than that of Al. The metallic character of elements increases down a group. Thus, the metallic character of Al is more than that of B. Considering the above statements, we get K > Mg. Hence, the correct order of metallic character is K > Mg > Al > B. 

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