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Mod. 1 Sec 3

STUDY
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principle quantum number
used to describe the energy level of an electron
n
principle quantum's number's symbol/ orbital quantum numbers
Orbital quantum number
used to describe shape possible at energy level (s, p, d, f)
magnetic quantum number
how many orbits/ orientations at energy level
Spin Quantum Number
tell you the spin of the election
2n
spin quantum number's definition
2 squared
magnetic quantum number's symbol
aufbau principle
fill orbitals from lowest to highest
hund's rule
when filling orbitals with more than one orientation, start with all "up" electrons "BUS RULE"
1s2s2p3s4p4s4d
fill order for electron configuration
s p d f
What are the four possible orbital shapes?
s
What is the orbital with the lowest energy level?
two
How many electrons are able to be in one orbital?
8
How many electrons are able to be in the 2nd energy level. (hint: 2n^2)
Pauli Exclusion Principle
No electrons can have the same 4 quantum numbers in a given element
Heisenberg Uncertainty Principle
there is a fundamental limit to how precisely we can know both the position and the momentum of a particle at a given time
Same number of protons
How many electrons are in a neutral atom?