Question

an element x belongs to 3 period and group 13 0f the modern periodic table (a) determine the valance electrons and valency of x​

Answer 1

Explanation:

an element x belongsto 3 period and exactly

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 3 valence electrons it belongs to group 13.

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