An element $X$ belongs to $3^{r d}$ period and group 16 of the Modern Periodic Table.
Name the element $X$ and state whether it is metallic or non-metallic.

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Solution

The element that belongs to period 3 and group 16 has valency 2 since it has 2 electrons less to complete octet. Hence the element is sulphur and it is a non-metal.

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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 its a metal or a non- metal.

An element X belongs to 3^rd period and group 2 of the periodic table. State :

(a) number of valence electrons (b) valency (c) metal or non-metal (d) name of the element

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3^{r d}

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