Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • NCERT
  • Which of the following correctly represent the electronic distribution in the Mg atom? (a) 3, 8, 1 (b) 2, 8, 2 (c) 1, 8, 3 (d) 8, 2, 2

Which of the following correctly represent the electronic distribution in the Mg atom?

(a) 3, 8, 1

(b) 2, 8, 2

(c) 1, 8, 3

(d) 8, 2, 2

Answers (2)

Answer: B

Solution:

The electron configuration of an atom shows the number of electrons in each sublevel in each energy level of the ground-state atom. The first sublevel filled will be the 1s sublevel, then the 2s sublevel, the 2p sublevel, the 3s, 3p, 4s, 3d, and so on. Atomic number of magnesium is 12 and Electron configuration is 1s^{2}2s^{2}2p^{6}3s^{2}. So, according to Bohr's formula of distribution of electrons (2n^{2}),,K shell (n=1) can accommodate 2 electrons, L shell (n=2) can accommodate 8 electrons and the rest 2 electrons are accommodated in M shell. So, its electronic configuration is 2,8,2.

Posted by

infoexpert23

View full answer

b

 

Posted by

vinaykumar H

View full answer

Similar Questions

Latest Question