Question

An element X belongs to third periodic and group 16 of the modern periodic table.1) determine the number of valence electron and the valency of X.2) molecular formula of the compound when X reacts with hydrogen and write its electron dot structures.3) name the element X and state the whether it is metallic or non-metallic.

Answer 1

There are 6 valence electrons and it's valency is 2. Molecular formula is RH2(R - the particular element).
Sulpher is X. It is non metallic.
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H. _ .S._.H
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