Electron Configuration

Question 1

quantum numbers

Answer 1

principal quantum number (n)

orbital angular momentum (l)

magnetic quantum number (ml)

electron spin (ms)

Question 2

determines how far the electron is from the nucleus

Answer 2

principal quantum number

n = 1, 2, 3, 4, 5, 6, 7

Question 3

determines the type of subshell the electron is in

Answer 3

orbital angular momentum

0 = sub-shell
1 = p-sub shell
2 = d-subshell
3 = f-subshell

Question 4

determines what orbital electron is in

Answer 4

magnetic quantum number

s orbitals: ml=0
p-orbitals: ml= -1, 0, 1
d-orbitals: ml= -2, -1, 0, 1, 2
f-orbitals: ml= -3, -2, -1, 0, 1, 2, 3

Question 5

determines if electron is spin-up or spin-down

Answer 5

electron spin

+1/2 (spin-up), -1/2 (spin-down)

Question 6

electrons are configured so they minimize the energy by occupying lower energy shells first

Answer 6

aufbau principle

Question 7

no two electrons can possess the same set of quantum numbers

Answer 7

pauli’s exclusion principle

Question 8

the most stable arrangement of electrons in subshells is the one with greatest number of parallel spins

Answer 8

hund’s rule of maximum multiplicity