Question

An element X belongs to third period and group 16 of the modern periodic table a) determine the no.of valence electrons and the valency of X, b)molecular formula of the compound when X reacts with H and writ its electron dot structure, c)name the element X and state whether it is metallic or non metallic.

Answer 1

a) an element X valence electron is 6 and valency 8-6 =2

b)when it react with H .....= HX

c) it is non metal.....and element is Sulphur