Pls solve the 3sum

Dear student,

2.In Lothar Meyer's plot between atomic volume and atomic weights, the alkali metals which are most electropositive occupy the peaks on the curve.

So the correct answer is (a) the most strongly electropositive alkali metals occupy peaks on the curve. 
3.An element X belongs to group 16 and 5th period,its atomic number 52(Tellurium).

Regards,

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The answer to the 3rd sum is c (i.e 52). The element is Tellurium
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