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  4. Which one of the following laws will represent the pairing of electrons in a subshell after each orbital is filled with one electron?

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Q. Which one of the following laws will represent the pairing of electrons in a subshell after each orbital is filled with one electron?

MHT CETMHT CET 2021

Solution:

Hund's rule represent the pairing of electrons in a subshell after each orbital is filled with one electron. Thus, this rule states that "during filling of electrons in a subshell, pairing of electrons cannot take place until there is no empty orbital available". This rule is also called Hund's rule of maximum multiplicity.