Transcripción 16/10/2025, 7:09:14

Apuntes

• Subtopic: Electron Configuration Notation The notation shown represents the electron configurations of elements in their ground state. Each line indicates the distribution of electrons across different atomic orbitals, following the Aufbau principle, Hund's rule, and Pauli exclusion principle. For example: - 1s² means the 1s orbital is filled with 2 electrons. - 2s² 2p⁶ indicates the 2s orbital has 2 electrons, and the 2p orbital has 6 electrons, completing the second energy level. - 3s² 3p⁶ 3d¹⁰ shows the third energy level with s, p, and d orbitals filled accordingly. • Subtopic: How to Learn and Write Electron Configurations To learn how to write these configurations: 1. Understand the order of orbital filling based on energy levels: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p, etc. 2. Fill each orbital with electrons following the Pauli exclusion principle (max 2 electrons per orbital) and Hund's rule (maximize unpaired electrons in degenerate orbitals). 3. Count the total electrons to match the atomic number of the element you're studying. For example, to write the configuration of oxygen (atomic number 8): - Fill 1s² (2 electrons) - Fill ...