chem Quiz Tuesday on the Aufbau Principle, Pauli's Exclusion Principle and Hund's Rule

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5 Terms

1
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What is the Aufbau Principle?

Electrons fill orbitals starting from the lowest energy level before moving to higher ones.

2
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What is the Pauli Exclusion Principle?

No two electrons in an atom can have the same set of quantum numbers. Each orbital holds two electrons with opposite spins.

3
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What is Hund's Rule?

Electrons fill orbitals of the same energy singly first before pairing up to reduce repulsion.

4
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How does Pauli's Exclusion Principle appear in a box diagram?

Each orbital contains at most two electrons, represented with arrows pointing in opposite directions (↑↓).

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How does Hund's Rule appear in a box diagram?

Electrons are placed singly in each degenerate orbital (e.g., in 2p^6 orbital, 2p_x, 2p_y, 2p_z) before pairing (↑ ↑ ↑).