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2·QUIZLET VOCABULARY: Quantum Numbers
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1. Angular Momentum Quantum Number: l Indicates sublevel that electron is in.
s - shape: spherical max 2 e
p -shape: dumbbell max 6 e
d -shape: 4 leaf clover max 10 e
f - shape: flower max 14 e
2. Aufbau principal: states that each electron occupies the lowest energy orbital available
3. electron configuration: the arrangement of electrons around nucleus in an atom
4. Hunds rule: orbitals of equal energy are each occupied by one electron before any orbital is occupied by a second
electron, and all electrons in singly occupied orbitals must have the same spin
5. Magnetic (orbital) quantum Number: ml Indicates orientation of orbital in space
S- 1 orbital
P- 3 orbitals
D- 5 orbitals
F- 7 orbitals
6. orbital: A 3-D space around the nucleus where an electron is likely (high probability) to be found.
7. pauli exclusion principle: An atomic orbital may describe at most two electrons, each with opposite spin
8. Principle Quantum Number: n Indicates the energy level that electron is located in
9. valence electrons: Electrons in the highest occupied energy level of an element's atoms; determines the
chemical properties of an element. To find, look at group # for main group elements. Usually the only
electrons involved in chemical reactions.
10. valence shell: Outermost energy level occupied by electrons of an atom.