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Question

Considering the atomic number and position in the periodic table, arrange the following elements in the increasing order of metallic character: Si,Be,Mg,Na,P.

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Solution

Arranging the elements into different groups and periods in order of their increasing atomic numbers.

1 2 13 14 15

----- Be ---- ----- -----

Na Mg ---- Si P

We know, metallic character increases down a group and decreases along a period as we move from left to right. Therefore, Na is the most metallic element, followed by Mg and Si while P is the least metallic element. Comparing Be and Mg, Mg is more metallic than Be.

So, the overall order of increasing metallic character is:
P<Si<Be<Mg<Na

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