Question

The electronic configuration of an element X is 2 8 6 to which group and Period of the modern periodic table does X belongs state its valency

Answer 1

It belongs to the 3rd group (because 3 shells are filled)

it belongs to the third period because Valency Is less than 3

Valency is 2

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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.