Question

An element which has atomic number 12. Name the element . Write it’ s electronic

configuration. Mention it’ s valancy and valance electrons .In which period and gp it is

placed.​

Answer 1

Answer:

1s2 2 S2 2p6 3s2

it is Mg.

it's Valency=2

Valence electrons =2

3rd period

2nd group

Answer 2

Answer:

Magnesium

electronic configaration -( 2,8,2)

Valecly-2

Valence electrons - 2

it is in the third period and second group..

Explanation:

As magnesium is 12th element

it has 2 electrons in the outermost shells..