CH 101 Lecture 3: Chapters 4-5 Lecture Notes

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Q= charge: =(cid:3044)(cid:3117)(cid:3044)(cid:3118)(cid:3045, sign matters large negative sign = very stable. Large positive sign = very unstable r= distance between particles: as charge increases, energy also increases (directly proportional) As distance between particles decreases, energy increases (inversely proportional) Elements with similar properties recur in a regular pattern: elements with similar properties fall into the same groups (columns) In a hydrogen-like atom (1 electron), all are possible, but only one is actually occupied. Pauli exclusion principle- 2 electron cannot have the same 4 quantum numbers in the same atom: every electron has a unique , orbitals can only hold 2 electrons. As the number of orbitals increase, so does the energy s

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