Exam 2 Flashcards
principle quantum number
n = energy level of electron/orbital
positive integer
angular momentum quantum number
l = shape of orbital
l = 0, 1, 2, …, n-1
magnetic quantum number
mₗ = orbital orientation
mₗ = -l, …, 0, …, l
spin quantum number
mₛ = spin of specific electron
mₛ = ±1/2
letter names associated with l values
l = 0, 1, 2, 3, 4
l = s, p, d, f, g
sketch orbital:
n=1
l=0
1s
0 nodes - nucleus doesn’t count
sphere
sketch orbital:
n=2
l=0
2s
1 node - radial
hollow sphere
sketch orbital:
n=2
l=1
2p
1 node - planar
dumbbell shape
sketch orbital:
n=3
l=1
3p
2 nodes - 1 planar, 1 radial
dumbbell with 2 hats
sketch orbital:
n=3
l=2
3d
2 nodes - planar
4 leaf clover or dumbbell with donut
sketch orbital:
n=4
l=2
4d
3 nodes - 2 planar, 1 radial
4 leaf clover or dumbbell with 4 hats
Hund’s Rule
Electrons should be placed evenly across degenerate orbitals before doubling up.
Pauli’s Exclusion Principle
Every electron within an atom has a unique identity, as determined by its n, l, mₗ, and mₛ values.
Aufbau Principle
When determining which electrons are in which orbitals, start from the lowest energy possibilities (orbitals).
paramagnetic
there are unpaired electrons in the atom
net spin non-zero
affected by magnetic fields