Question

Which of the following correctly represents the electronic distribution in the Si atom? A. 2,8,3 | B. 2,3,8 | C. 2,4,8 | D. 2,8,4

Answer 1

The electron distribution in the Si atom : D. 2,8,4

Further explanation

The maximum number of electrons that can be filled in the nth electron shell is 2n²(n=shell)

• K shell (n = 1) maximum 2 x 1² = 2 electrons
• L shell (n = 2) maximum 2 x 2² = 8 electrons
• M shell (n = 3) maximum 2 x 3² = 18 electrons
• N shell (n = 4) maximum 2 x 4² = 32 electrons

Electron configuration of Si : 1s² 2s2²2p6⁶3s²3p² = 14 electron

The electron distribution :

K shell = 2

L shell = 8

M shell = 4