R.1 Physical constants
Table of Contents
-
1
2
3
4
5
6
7
8
9
R
S
¬
®
m
A
-
N
A
-
a
0
-
k
-
q
-
m
0
-
m
0
-
e
0
-
h
-
M
-
R
-
c
-
V
T
Atomic mass:
m
A
= 1.66 x 10
-27
kg
Avogadro's number:
N
A
= 6.022 x 10
23
atoms per mole
Bohr radius:
a
0
= 52.9177 picometer = 0.529177 Angstrom
Boltzmann's constant:
k
= 1.38 x 10
-23
Joule/Kelvin = 8.62 x 10
-5
electron Volt/Kelvin
Electronic charge:
q
= 1.602 x 10
-19
Coulomb
Free electron rest mass:
m
0
= 9.11 x 10
-31
kilogram = 5.69 x 10
-16
eV s
2
cm
-2
Permeability of free space:
m
0
= 4
p
x 10
-7
Henry/meter
Permittivity of free space:
e
0
= 8.854 x 10
-12
Farad/meter = 8.854 x 10
-14
Farad/centimeter
Planck's constant:
h
= 6.625 x 10
-34
Joule second = 4.134 x 10
-15
electron Volt second
Proton rest mass:
M
= 1.67 x 10
-27
Kilogram
Rydberg constant:
R
= 2.17991 x 10
-18
Joule = 13.6058 electron Volt
Speed of light in vacuum:
c
= 2.998 x 10
8
meter/second = 2.998 x 10
10
centimeter/second
Thermal voltage (at T = 300 K):
V
T
= 25.86 milliVolt
Units and Prefixes
© Bart J. Van Zeghbroeck, 1997