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The correct increasing order of metallic nature of Si, Be, Mg, Na, P is

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P < Si < Be < Mg < Na

Si < P < Be < Mg < Na

Si < P < Mg < Be < Na

Na < Mg < Be < Si < P

answer is A.

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Detailed Solution

Metallic character increases down a group and decreases from left to right across a period. Hence, the order of increasing metallic character is P<Si<Be<Mg<Na.

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