Question

what principles or rules are violated in the following electronic configuration 1s^(2)2s^(3)

Answer 1

Answer: It should be 1s²2s²2p¹

Explanation:

We all know that size of accommodation of electron in various orbital is

s orbital can take 2 electrons at max

p can take 6 electrons at Max.

d can take 10 electrons at Max

f can take 14 electrons at Max

So here this configuration of 5 electrons which is atomic no 5 that is boron.

Whose idealistic configuration should be

1s2 2s2 2p1.

But the given configuration is violation of the fact that s orbital could hold only 2 electrons. Hence it is wrong.