Question

Write the electronic configuration of Mg, Al and

Si.To which groups and period/s they belong to?

[Atomic No. of Mg ,Al and Si are 12,13 and 14 respectively.​

Answer 1

Answer:

Mg : 2,8,2 ; period 3, group 2

Al : 2,8,3 ; period 3, group 13

Si : 2,8,4 ; period 3, group 14

Explanation:

no of orbits determine period no.

and no.of electrons in the last shell determine group no.

Answer 2

Answer:

$Electronic configuration:-$

1) Mg = 2,8,2

group:- 2 and period:-3

2) Al = 2,8,3

group:-3 and period:-3

3) Si = 2,8,4

group:-4 and period:-3

Explanation:

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