Question

An element X belongs to period 3 and group 2 of the periodic table.(state the number of electrons in the outer most shell of element).​

Answer 1

The element which belongs to 3rd period and group 2 is Magnesium.

Its electronic configuration is [Ne]3s

2

i) The no. of valence electrons =2

ii) Valency =2

iii) It is a metal as it belongs to the s-block

Answer 2

Answer:

it will the 2 electrons in its outer most shell.

Explanation:

it will the 2 electrons in its outter most shell as it beleongs to group 2 and it has 3 shells means 2,8,2 will be its electronic configuration as it belongs to period 3 .

may this will be helpfull to you.