Question

explain hund's rule and Pauli's exclusion principle​

Answer 1

• Hund's Rule states that if 2 or more degenerate (i.e. same energy) orbitals are available, one electron goes into each until all of them are half full before pairing up . ... The Pauli Exclusion Principle states that no two electrons can be identified by the same set of quantum numbers.

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Answer 2

Answer:

$\fbox\red{Hands rule}$

===>One electron goes into each all of them are half ful before pearing up.

$\fbox\red{Pauli's exclusion principal}$

===>No two electrons can be identified by the same set of quantum numbers(must have different spins).

Explanation:

$\fbox\red{Hands rule}$

=====>States that if two or more degenerate(same energy) orbitals are Available,

one electron goes into each untill all of them are half full pearing up.

=====>Hands rule tell us about the electrons in an atom should be placed into de generate orbit.

=====>Hand's rule of maximum multiplicity rule states that for a given electron configuration, the term with maximum multiplicity falls lowest in energy.

=====>According to this rule electron pairing in p,d and f orbitals cannot be occur until each orbital of a given subshell contains 1 electron each or is singly occupied.

it states that :-

===> In a sublevel, each orbitals is singly occupied before it is doubly occupied.

===> The electron process in singly occupied orbitals possess identical spin.

$\fbox\red{Pauli's exclusion principle}$

====>States that no two electrons can be identified by the same set of quantum numbers. This is actually why we have the spin quantum number $Ms$

====>To ensure that two electrons within the same orbital have unique key set of quantum number.

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