Quantum Mechanics

Question 0

Azimuthal quantum number

Answer 0

2nd quantum number (l) designates sub shell (spdf) l=0=s L=1=p

L = N-1

Question 1

Principle quantum number

Answer 1

First quantum number (n) designates shell level. Larger shell number is higher energy. N = period except for lanthanides and actinides which lag 2 shells behind

Question 2

Magnetic quantum number

Answer 2

3rd quantum number (ml) describes precise orbital of a sub shell. Ranges from -l to l.

Question 3

Electron spin quantum number

Answer 3

4th quantum number. (Ms) can have -1/2 or +1/2

Question 4

Pauli exclusion principle

Answer 4

No 2 electrons in the same atom can have the same 4 quantum numbers

Question 5

How many total orbitals are in a shell?

Answer 5

N^2

Question 6

Aufbauprinciple

Answer 6

With each new proton added to create a new element, a new electron is added as well and electrons will add to lowest energy state orbital

Question 7

Hund’s rule

Answer 7

Electrons will not fill any orbital in the same sub shell until all orbitals in that sub shell contain at least one electron and unpaired electrons will have parallel spins