Question

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

Options

• Pauli's exclusion prtnciple 

• Hund's rule 

• Heisenberg's uncertainty principle 

• Hess's law

Answer 1

Hund's rule 

Explanation:

After each orbital has one electron in it, the electrons in a subshell pair up according to Hund's rule. According to this law, electron pairing cannot occur during the filling of a subshell until there are no available vacant orbitals. This principle is also known as Hund's maximal multiplicity rule.