CHEM101 Chapter Notes - Chapter 7: Azimuthal Quantum Number, Effective Nuclear Charge, Magnetic Quantum Number

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CHEM101 Full Course Notes
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CHEM101 Full Course Notes
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The electron configuration of an element is the distribution of electrons within the shells and subshells of its atoms. The stern-gerla(cid:272)h e(cid:454)peri(cid:373)e(cid:374)t sho(cid:449)ed a (cid:271)ea(cid:373) of ag ato(cid:373)s split due to the ato(cid:373)"s ele(cid:272)tro(cid:374)s having one of the two possible spin values. We assign +1/2 to the first electron. The pauli exclusion principle states that no two electrons have the same 4 quantum numbers. The major consequence of the exclusion principle is that each atomic orbital can only hold a maximum of 2 electrons and the must have opposing spins. Electrostatic effects arise from attractions between opposite charges and repulsion between like charges. The energy difference arises from three factors: nuclear attraction, electron repulsion, and orbital shape (radial probability distribution). The interplay of the above mentioned three factors lead to shielding and penetration. More energy is needed to remove an electron from a stable subshell.

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