,
,FUNDAMENTAL CONSTANTS
Value
Constant Symbol
Power of
Units
10
Speed of light c 2.997 924 108 m s-1
58*
Elementary charge e 1.602 176 10-19 C
565
Planck's constant h 6.626 069 10-34 Js
57
1.054 571 10-34 Js
726
Boltzmann's constant k 1.380 6488 10-23 J K-1
Avogadro's constant NA 6.022 141 1023 mol-1
29
Gas constant R= 8.314 4621 J K-1
NAk mol-1
Faraday's constant F= 9.648 533 104 C mol-1
NAe 65
Mass
Electron me 9.109 382 10-31 kg
91
Proton mp 1.672 621 10-27 kg
777
Neutron mn 1.674 927 10-27 kg
351
Atomic mass constant mu 1.660 538 10-27 kg
921
Vacuum permeability μ0 4π* 10-7 J s2 C-2
m-1
, Vacuum permittivity ε0 = 1/ 8.854 187 10-12 J-1 C2
μ0c2 817 m-1
4πε0 1.112 650 10-10 J-1 C2
056 m-1
Bohr magneton 9.274 009 10-24 J T-1
68
Nuclear magneton 5.050 783 10-27 J T-1
53
Proton magnetic μp 1.410 606 10-26 J T-1
moment 743
g-Value of electron ge 2.002 319
304
Magnetogyric ratio
Electron -1.001 159 1010 C kg-1
652
Proton 2.675 222 108 C kg-1
004
Bohr radius 5.291 772 10-11 m
109
Rydberg constant 1.097 373 105 cm-1
157
13.605 692 eV
53
Fine-structure constant 7.297 352 10-3
5698
α-1 1.370 359 102
990 74
Stefan-Boltzmann 5.670 373 10-8 W m-2
constant K-4
Standard acceleration of g 9.806 65* m s-2
free fall
Gravitational constant G 6.673 84 10-11 N m2
kg-2
* Exact value. For current values of the constants, see the National Institute of Standards
,FUNDAMENTAL CONSTANTS
Value
Constant Symbol
Power of
Units
10
Speed of light c 2.997 924 108 m s-1
58*
Elementary charge e 1.602 176 10-19 C
565
Planck's constant h 6.626 069 10-34 Js
57
1.054 571 10-34 Js
726
Boltzmann's constant k 1.380 6488 10-23 J K-1
Avogadro's constant NA 6.022 141 1023 mol-1
29
Gas constant R= 8.314 4621 J K-1
NAk mol-1
Faraday's constant F= 9.648 533 104 C mol-1
NAe 65
Mass
Electron me 9.109 382 10-31 kg
91
Proton mp 1.672 621 10-27 kg
777
Neutron mn 1.674 927 10-27 kg
351
Atomic mass constant mu 1.660 538 10-27 kg
921
Vacuum permeability μ0 4π* 10-7 J s2 C-2
m-1
, Vacuum permittivity ε0 = 1/ 8.854 187 10-12 J-1 C2
μ0c2 817 m-1
4πε0 1.112 650 10-10 J-1 C2
056 m-1
Bohr magneton 9.274 009 10-24 J T-1
68
Nuclear magneton 5.050 783 10-27 J T-1
53
Proton magnetic μp 1.410 606 10-26 J T-1
moment 743
g-Value of electron ge 2.002 319
304
Magnetogyric ratio
Electron -1.001 159 1010 C kg-1
652
Proton 2.675 222 108 C kg-1
004
Bohr radius 5.291 772 10-11 m
109
Rydberg constant 1.097 373 105 cm-1
157
13.605 692 eV
53
Fine-structure constant 7.297 352 10-3
5698
α-1 1.370 359 102
990 74
Stefan-Boltzmann 5.670 373 10-8 W m-2
constant K-4
Standard acceleration of g 9.806 65* m s-2
free fall
Gravitational constant G 6.673 84 10-11 N m2
kg-2
* Exact value. For current values of the constants, see the National Institute of Standards
