Download Quantum Numbers

•
•
Quantum numbers help us understand
where the electron is and describe the
orbital occupied by the electron
Quantum numbers tell us 4 things…
• distance from the nucleus
• shape
• position
• spin
1

The principal quantum number relates
primarily to the main energy level of an
electron. n = 1, 2, 3, 4, ...
2

The secondary
quantum number
relates primarily to
the shape of the
orbital. The
number of values
of l equals the
volume of the
principal quantum
number.
3
4
5
6

The magnetic
quantum number,
ml, relates primarily
to the direction of
the electron orbit.
The number of
values for ml is the
number of
independent
orientations of
orbits that are
possible.
7

The spin quantum
number, ms,
relates to the
property of an
electron that can
best described as
its spin. The spin
quantum number
can only be +1/2
or -1/2 for any
electron.
8
9
Assigned Questions
p. 182 Practice UC # 1, 2, 3, 4, 5
p. 184 Section 3.5 Question UC # 1, 2, 3, 4, 5, 6
10
11
12
13