Question

An element 'X' belongs to 3rd period and group 16 of the Modern Periodic Table. (i) Determine the number of valence electrons and the valency of 'X'.

Answer 1

An element X belongs to 3rd period and group 16 of the modern periodic table (1)determine the number of Valence Electrons and the valency of X(2) molecular formula of the compound when xreact hydrogen and write itselectron dot structure(3) name theelement X and state whether it is metallic or nonmetallic
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Answer 2

Answer:

1 . Since ‘X’ has three energy shells and period number of an element is equal to the number  of energy shells, X belongs to 3rd period.

2 . X has 6 valence electrons it belongs to group 16.

3.  Valency will be 2. To acquire noble gas configuration it will gain 2 electrons.