Hund S Law
According to hund s rule.
Hund s law. Hunds rule of maximum multiplicity. According to this rule electron pairing in p d and f orbitals cannot occur until each orbital of a given subshell contains one electron each or is singly occupied.
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 the rule states that for a given electron configuration the lowest energy term is the one with the greatest value of spin multiplicity. Every orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied and all electrons in singly occupied orbitals have the same spin.
All of the electrons in singly occupied orbitals have a similar spin to maximize total spin. Each orbital in a sublevel is separately occupied before any orbital is doubly occupied.
Consider also the electron configuration of oxygen. Every orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied and all electrons in singly occupied orbitals have the same spin.
An orbital can hold 0 1 or 2 electrons only and if there are two electrons in the orbital they must have opposite paired spins. For a given electron configuration the term.
Aufbau principle electrons fill orbitals starting at the lowest available energy state before filling higher states 1s before 2s. The basis for this rule is essentially that if the electrons are orbiting in the same direction and so have a large total angular momentum they meet less often than when they orbit in opposite directions.
Example 1 consider the different ways in which a pair of electrons might be arranged in p orbitals. This implies that if two or more orbitals of equal energy are.
Hund s rule states that the lowest energy electron configuration the ground state in any electron subshell is the one with the greatest number of parallel electron spins. Hund s rule states that a larger total spin state of an atom sometimes makes the atom more stable.
Hund s rule states that each orbital in a subshell is only obtained before any orbital is double involved. 1s 2 2s 2 2p 2.
The three rules are. In the configuration p 2 we expect the order 3 p 1 d 1 s.
Hunds rule of maximum multiplicity rule states that for a given electron configuration the term with maximum multiplicity falls lowest in energy. The two 2s electrons will occupy the same orbital whereas the two 2p electrons will be in different orbital and aligned the same direction in accordance with hund s rule.
There are a few rules for the box and arrow configurations.
