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Electron Configuration in Chemistry

Learn how electrons are arranged around the nucleus following Aufbau, Pauli Exclusion, and Hund's Rule. Explore Aufbau Diagrams for various elements and understand blocks in the Periodic Table.

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Electron Configuration in Chemistry

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  1. Electron Configuration Chemistry Mrs. Coyle

  2. Electron Configuration • The way electrons are arranged around the nucleus.

  3. Three rules are used to build the electron configuration: • Aufbau principle • Pauli Exclusion Principle • Hund’s Rule

  4. Aufbau Principle • Electrons occupy orbitals of lower energy first.

  5. Pauli Exclusion Principle • An orbital can hold only two electrons and they must have opposite spin.

  6. Hund’s Rule In a set of orbitals, the electrons will fill the orbitals in a way that would give the maximum number of parallel spins. Analogy: Students could fill each seat of a school bus, one person at a time, before doubling up.

  7. Aufbau Diagram for Hydrogen

  8. Aufbau Diagram for Helium

  9. Aufbau Diagram for Lithium

  10. Aufbau Diagram for Beryllium

  11. Aufbau Diagram for Boron

  12. Aufbau Diagram for Carbon

  13. Aufbau Diagram for Nitrogen

  14. Aufbau Diagram

  15. Blocks in the Periodic Table

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