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Abbreviated
list of quantities, units and symbols in physical chemistry
4.5 physical quantities:
atoms, molecules and spectroscopy
| Physical Quantity |
Symbol |
SI Unit |
| nucleon number, mass number |
A |
1 |
| proton number, atomic number |
Z |
1 |
| neutron number |
N |
1 |
| decay constant |
l |
s-1 |
| ionization energy |
Ei
, I |
J |
| dissociation energy |
Ed
, D |
J |
| electron affinity |
Eea |
J |
| quantum numbers: |
| principal |
n |
1 |
| electron orbital |
l, L |
1 |
| -- component |
ml
, ML |
1 |
| electron spin |
s, S |
1 |
| -- component |
ms
, MS |
1 |
| total angular momentum |
j, J |
1 |
| -- component |
mj , MJ |
1 |
| nuclear spin |
I |
1 |
| -- component |
MI |
1 |
| vibrational |
v |
1 |
| magnetic moment of a particle |
µ, m |
J T-1, A m2 |
| magnetogyric ratio |
g |
C kg-1 |
| g-factor |
g |
1 |
| Larmor circular frequency |
wL |
s-1 |
| quadrupole moment |
Q,, Q, eQ |
C m2 |
| wavelength |
l |
m |
| wavelength in a vacuum |
 |
m-1 |
| total term |
T |
m-1 |
| electronic term |
Te |
m-1 |
| vibrational term |
G |
m-1 |
| rotational term |
F |
m-1 |
| rotational constants |
A, B, C |
m-1 |
Page last modified 9 June 2000.
Copyright © 2000 International Union of Pure and Applied Chemistry.
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