Physical Constants

Constant
Symbol
Magnitude
Avogadro's Number
NA
6.022 x 1023 molecules/mole
Universal gas constant
R
8.314472 J/(mol*K)
Boltzmann's constant
k
1.38 x 10-23 J/K = 8.62 x 10-5 eV/K
Stefan-Boltzmann constant
s
5.67x10-8 J/(s*m2*K4)
Electronic charge
q
1.6 x 10-19 C
Electronvolt
eV
1.6 x 10-19 J
Planks constant
h
6.625 x 10-34 J-s
Thermal voltage, kT, at 300 oK
Vt
25.8 mV
Velocity of light
c
3 x 1010 cm/s
Permeability of free space
uo
1.257 x 10-8 H/cm
Permittivity of free space
eo
8.854 x 10-14 F/cm
Free-electron mass
m
9.1 x 10-31 kg

Atomic Masses

Element
Symbol
Atomic Mass
Atomic Number
Hydrogen
H
1.00794 u
1
Helium
He
4.00260 u
2
Lithium
Li
6.941 u
3
Beryllium
Be
9.0122 u
4
Boron
B
10.811 u
5
Carbon
C
12.0107 u
6
Nitrogen
N
14.0067 u
7
Oxygen
O
15.9994 u
8
Fluorine
F
18.9984 u
9
Neon
N
20.1797 u
10
Sodium
Na
22.9897 u
11
Magnesium
Mg
24.305 u
12
Aluminum
Al
26.9815 u
13
Silicon
Si
28.0855 u
14
Phosphorus
P
30.9738 u
15