Which of the following set of elements is written correctly in the order of their increasing metallic character?
A
Mg,Al,Si
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B
C,O,N
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C
Na,Li,K
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D
Be,Mg,Ca
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Solution
The correct option is DBe,Mg,Ca On going down in a group of periodic table, the metallic character of elements increases. Hence, (d) is the correct answer.