CH110 Lecture Notes - Lecture 3: Chlorine
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Electrons with the same n and l quantum numbers but different magnetic quantum numbers (ml) do not effectively screen on another. An electron in an s orbital does not screen the other electron in the same orbital. Electrons in any one of the p orbitals do not screen electrons in the other p orbitals. E. g. electrons in px orbital do not screen electrons in py or pz orbitals and vice versa. Electrons in any one of the d orbitals do not screen electrons in the other d orbitals. Electrons in any one of the f orbitals do not screen electrons in the other f orbitals. Orbitals that have the same energy are called degenerate orbitals. For an electron to be effective at screening, it has to be between the screened electrons and the nucleus. Electrons that experience less screening are more stable (lower energy = greater negative energy) In one electron atoms/ions (h, he+, li2+, etc):
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