Question

3.
Mention the rule deviated in the following configuration. 1s 2s°2p​

Answer 1

Answer:

Explanation:

Aufbau Principle is violated as the orbital having lower energy must be filled first. So 1s could not be vacant in 1s  

0

2s  

2

2p  

4

.

An electron having the lowest value of (n+l) will be filled first.

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