NCERT Solution
Class 11
Chemistry
Classification of Elements and Periodicity in Properties
considering the elements b al mg and k the cor...

Question:
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

Answer:

Boron and aluminium belongs to p block elements and are group 13 elements whereas magnesium and potassium belongs to s block elements. Potassium belongs to group 1 and magnesium belongs to group 2. 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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Question:
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

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Question: 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

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Question:
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