Hund's rule vs aufbau principle
- why hunds rule is called maximum multiplicity
- why is hunds rule of maximum multiplicity
- why is hunds rule of maximum multiplicity called so
- what is hund’s rule of maximum multiplicity
Explain hund's rule with example!
Hund's rule of maximum multiplicity
Rule used to predict the ground state of an atom or molecule with open electron shells
Hund's rule of maximum multiplicity is a rule based on observation of atomic spectra, which is used to predict the ground state of an atom or molecule with one or more open electronic shells.
Application of hund's rule
The rule states that for a given electron configuration, the lowest energy term is the one with the greatest value of spin multiplicity.[1] This implies that if two or more orbitals of equal energy are available, electrons will occupy them singly before filling them in pairs.
The rule, discovered by Friedrich Hund in 1925, is of important use in atomic chemistry, spectroscopy, and quantum chemistry, and is often abbreviated to Hund's rule, ignoring Hund's other two rules.
Atoms
[edit]The multiplicity of a state is defined as 2S + 1, where S is the total electronic spin.[2] A high multiplicity state is therefore the same as a high-spin state.
The lowest-energy state with maximum multiplicity usually has unpaired electrons all with parallel
- hunds rule of maximum multiplicity states that
- hund’s multiplicity rule