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  2. Hund's rule of maximum multiplicity - Wikipedia

    en.wikipedia.org/wiki/Hund's_Rule_of_Maximum...

    For example, the nitrogen atom ground state has three unpaired electrons of parallel spin, so that the total spin is 3/2 and the multiplicity is 4. The lower energy and increased stability of the atom arise because the high-spin state has unpaired electrons of parallel spin, which must reside in different spatial orbitals according to the Pauli ...

  3. Hund's rules - Wikipedia

    en.wikipedia.org/wiki/Hund's_rules

    The three rules are: [1] [2] [3] For a given electron configuration, the term with maximum multiplicity has the lowest energy. The multiplicity is equal to + , where is the total spin angular momentum for all electrons. The multiplicity is also equal to the number of unpaired electrons plus one. [4]

  4. Molecular Hamiltonian - Wikipedia

    en.wikipedia.org/wiki/Molecular_Hamiltonian

    Electrons and nuclei are, to a very good approximation, point charges and point masses. The molecular Hamiltonian is a sum of several terms: its major terms are the kinetic energies of the electrons and the Coulomb (electrostatic) interactions between the two kinds of charged particles.

  5. Multiplicity (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Multiplicity_(chemistry)

    Each has two electrons of opposite spin in the π* level so that S = 0 and the multiplicity is 2S + 1 = 1 in consequence. In the first excited state, the two π* electrons are paired in the same orbital, so that there are no unpaired electrons. In the second excited state, however, the two π* electrons occupy different orbitals with opposite spin.

  6. Quantum superposition - Wikipedia

    en.wikipedia.org/wiki/Quantum_superposition

    These conditions mean that for any two solutions of the wave equation, and , a linear combination of those solutions also solve the wave equation: = + for arbitrary complex coefficients and . [ 1 ] : 61 If the wave equation has more than two solutions, combinations of all such solutions are again valid solutions.

  7. How to Introduce Dogs: The Best Trainer-Approved Method - AOL

    www.aol.com/introduce-dogs-best-trainer-approved...

    8. Off-Leash Contact. If the on-leash contact went well, on another day, it may be possible to introduce the dogs off-leash in a neutral and safely fenced area after the next parallel walk.

  8. Triplet oxygen - Wikipedia

    en.wikipedia.org/wiki/Triplet_oxygen

    Under a molecular orbital theory framework, the oxygen-oxygen bond in triplet dioxygen is better described as one full σ bond plus two π half-bonds, each half-bond accounted for by two-center three-electron (2c-3e) bonding, to give a net bond order of two (1+2× ⁠ 1 / 2 ⁠), while also accounting for the spin state (S = 1).

  9. Today's Wordle Hint, Answer for #1275 on Sunday, December 15 ...

    www.aol.com/todays-wordle-hint-answer-1275...

    Today's Wordle Answer for #1275 on Sunday, December 15, 2024. Today's Wordle answer on Sunday, December 15, 2024, is FUNKY. How'd you do? Next: Catch up on other Wordle answers from this week.