Chem book Ch 8
Terms
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- What is the Periodic Principle?
- On the Periodic Table, when arranged by atomic mass the elements exhibit a periodic recurrence
- What is the n Quantum Number?
- This is the Orbital Energy size (a shell)
- What is l?
- l is the Orbital shape within s p d f. n-1 or 0
- What is the Ml?
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This is the Orbital Orientation.
Integers from -l to 0 to + l - What is Ms?
- This is the direction of the electron spin, +1/2 or -1/2
- Pauli Exclusion Principle
- No two electrons in the same atom can have the same four quantum numbers. The spins have to oppose each other in order to be parallel.
- Z eff
- the nuclear charge that an electron experiences
- Shielding
- the repulsion between two electrons that counteracts the nuclear attraction. Makes electrons easier to remove
- Penetration
- Caused by the 2s orbital, causes attraction between it and the nucleus. It reduces shielding between 1s and 2s.
- Aufbau Principle
- The concept of building up an atom by adding electrons to each lower level energy orbitals.