| An element 'X' belongs to 3rd period and group 16 of the Modern Periodic Table. |
| (a) Determine the number of valence electrons and the valency of 'X'. |
| (b) Molecular formula of the compound when 'X' reacts with hydrogen and write its electron dot structure. |
| (c) Name the element X' and state whether it is metallic or non-metallic. |
Answer:
\[X=2,\,8,\,6\]
(a) Valence electrons are 6
Valency = 2
(b) Formula \[={{H}_{2}}X\]
(c) X is sulphur, it is a metal.
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