2) The Quantum Numbers - N3.pdf - Quantum Model and Quantum...

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Quantum Model andQuantum Numbers
Quantum Mechanicsthe branch of physics thatuses mathematical equations to describe the waveproperties of subatomic particles.Orbitala wave function that predicts anelectron’s energy and location within an atom.Quantum NumbersFour numbers used to describe a specificelectron in an atom.Each electron has its own specific set of quantumnumbers.Quantum Model of the Atom
The First Quantum NumberAKA principal quantum number,Symbol “n”Indicates the energy level and distance from thenucleus of an electron (same as period number)Higher nfarther from nucleus and greater energyn = 1, 2, 3… (always a positive whole number)If an electron’sprinciple quantum numberdecreases, energy is emitted
The first quantum number also helps recognize howmany electrons may reside in that shellUsing the formula2?2will indicate how manyelectrons per shellWhen? = 1, 212= 2. Therefore there are 2electrons in a full first shellWhen? = 2, 222= 8When? = 3, 232= 18When? = 4, 242= 32When? = 5, 252= 50

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Term
Summer
Professor
Cordeiro
Tags
Electron, Atomic orbital, Pauli exclusion principle, Orbital shapes

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