This chemistry video tutorial explains how to write the ground state electron configuration of an atom / element or ion using noble gas notation and how to fill the orbital diagrams. It contains examples and practice problems that include ions, transition metals, and a few exceptions. Here is a list of topics: 1. Electron Configuration of Elemental Sulfur - S 2. Atomic Number vs Mass Number 3. Number of protons and electrons in atoms and ions 4. Ground State Electron Configuration of Sulfide S-2 5. How To Determine the Number of Paired and Unpaired Electrons 6. Electron Configuration - Valence Electrons vs Core Electrons 7. How To Find the Number of S, P, and D Electrons in an element 8. Sublevels - 1s 2s 2p 3s 3p 4s 3d 4p 9. Orbital Filling Process and Orbital Energy Level Diagrams 10. Electron Configuration of Nitrogen (N) and Nitride 11. Cations vs Anions 12. Electron Configuration Using Noble Gas Notation - He, Ne, and Ar 13. Electron Configuration of Aluminum (Al) and Al+3 Cation 14. Electron Configuration of Transition Metals - Co, Co+2, and Co+3 15. Paramagnetic vs Diamagnetic Substances - Paired vs Unpaired Electrons 16. Orbital Diagrams - Up and Down Arrows 17. Aufbau Principle and Hund's Rule 18. Periodic Table - Atomic Number and Noble Gases 19. Electron Configuration Exceptions - Chromium Cr , Molybdenum Mo, Copper Cu, Silver Ag, and Gold Au.
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