Question

The electronic configuration of an element 'X' is 2,8,5.'X' lies in group number _______ of the modern periodic table. ​

Answer 1

Answer:

Element 'X' is sulphur(2,8,6)

Thus, it's atomic number will be =2+8+6=16

Thus the element is Si

It belongs to p-block of periodic table.

Its electronic configuration can also be written as [Ne]3s

2

3p

4

Thus it belongs to 3

rd

period

Group number =16

Its valency will be 8−6=2

Explanation:

Element 'X' is sulphur(2,8,6)

Thus, it's atomic number will be =2+8+6=16

Thus the element is Si

It belongs to p-block of periodic table.

Its electronic configuration can also be written as [Ne]3s

2

3p

4

Thus it belongs to 3

rd

period

Group number =16

Its valency will be 8−6=2