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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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