RFKNO Flashcards
1
Q
What is the aufbau principle ?
A
Electrons fill orbitals in order of increasing energy
2
Q
What is Hund’s Rule
A
When degenerate orbitals are available, electrons fill each singly, keeping their spins parallel before spin pairing starts
3
Q
What is the Pauli exclusion principle
A
No two electrons in one atom can have the same set of four quantum numbers, therefore, no orbital can hold more than two electrons and these two electrons must have opposite spins
4
Q
What is Heisenberg’s Uncertainty Principle ?
A
States that the position and a velocity cannot both be measured exactly, at the same time, we can only give the probability of finding the electron in the orbital
