Question

I will mark as brainliest...​

Answer 1

Explanation:

3.

a) 2,8,4

b) 2,8,8,2

No. of electrons in X = Atomic No. of X = 14

No. of neutrons in Y = Atomic mass - Atomic no. = 20

Hope this answer helped you buddy

Please mark my answer as brainliest

Please follow me.... I will follow you back

Answer 2

Explanation:

Here the atomic no. of X is 14

it means that X is Silicon. (Si)

No. of electrons in X is 14

Electronic configuration of Silicon is

2, 8 , 4

Here atomic no. of Y is 20

it means Y is Calcium ( Ca )

no of neutron in Y is 20.

Electronic configuration of Calcium

2,8,8,2