Electron Configuration PDF

# Electron Configuration ## Electron Configuration - 1s - 2s - 2p - 3s - 3p - 3d - 4s - 4p - 4d - 4f - 5s - 5p - 5d - 5f - 6s - 6p - 6d - 7s - 7p ## Electron Configuration The electron configuration of iodine atom: - I: 1s²2s²2p⁶3s²3p⁶...

# Electron Configuration ## Electron Configuration - 1s - 2s - 2p - 3s - 3p - 3d - 4s - 4p - 4d - 4f - 5s - 5p - 5d - 5f - 6s - 6p - 6d - 7s - 7p ## Electron Configuration The electron configuration of iodine atom: - I: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁵ or - I: [Kr]5s²4d¹⁰5p⁵ # Periodic Table of Elements | Atomic # | Symbol | Name | | ----------- | ----------- | ----------- | | 1 | H | Hydrogen | | 2 | Li | Lithium | | 3 | Na | Sodium | | 4 | K | Potassium | | 5 | Rb | Rubidium | | 6 | Cs | Cesium | | 7 | Fr | Francium | # Electron Configuration | Element | Atomic No. | Electronic configuration | | ----------- | ----------- | ----------- | | Li | 3 | 1s² 2s¹ | | Na | 11 | 1s² 2s² 2p⁶ 3s¹ | | K | 19 | 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ | | Rb | 37 | 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰4s²4p⁶5s¹ | | Cs | 55 | 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰4s²4p⁶4d¹⁰5s²5p⁶6s¹ | | Fr | 87 | 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰4s²4p⁶4d¹⁰5s²5p⁶6s²4f¹⁴5d¹⁰6p⁶7s¹ | The elements in each group behave alike chemically because they have similar electron configurations. # Electron Configuration | Element | Atomic No | Electronic configuration | | ----------- | ----------- | ----------- | | F | 9 | 1s² 2s² 2p⁵ | | Cl | 17 | 1s² 2s² 2p⁶ 3s² 3p⁵ | | Br | 35 | 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰4s²4p⁵ | | I | 53 | 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰4s²4p⁶4d¹⁰5s²5p⁵ | Because they have similar electron configuration. ## Electron Configuration **Valence Electrons** These are the electrons in the outer most principle quantum level atom. **Core Electrons** These are the inner electrons other than valence electrons. The most important electrons because they involved in bonding. # Electron Configuration Elements in the same group have the same valence electron configuration E.g. Li and Na - Li₃: 1s²2s¹ = 1s² 2s¹ - Na₁₁: [Ne] 3s¹ = [Ne] 3s¹