The Handy Chemistry Answer Book (2014)
Physical Constants
Constant |
Symbol |
Value |
Acceleration due to gravity |
g |
9.806 m/s |
Avogadro number |
NA |
6.0221367 × 1023 particles mol−1 |
Bohr magneton |
μβ |
9.2740154 × 10−24 J/T |
Bohr radius |
a0 |
5.2917721092(17) × 10−11 m |
Boltzmann constant |
kB |
6.6260755 × 10−34 J × s |
Classical electron radius |
re |
2.8179403267(27) × 10−15 m |
Elementary charge |
e |
1.60217733 × 10−19 C |
Faraday constant |
F |
9.64846 × 104 C mol−1 |
Free electron g factor |
ge |
2.002319304 |
Gas constant |
R |
8.31451 m2 × kg/s2 × K × mol−1 |
8.3144621 J K−1 mol−1 |
||
5.189 × 1019 eV K−1mol−1 |
||
0.08205746 L atm K−1 mol−1 |
||
1.9858775 cal K−1 mol−1 |
||
Mass—electron |
me |
9.1093897 × 10−31 kg |
Mass—neutron |
mn |
1.6749286 × 10−27 kg |
Mass—proton |
mp |
1.6726231 × 10−27 kg |
Permeability of vacuum |
μ0 |
12.566370614 × 10−7 T2 × m3/J |
Permittivity of vacuum |
ε0 |
8.854187817 × 10−12 C2 J−1 m−1 |
Planck constant |
h |
6.6260755 × 10−34J × s |
Rydberg constant |
R∞ |
1.973731568539(55) × 107 m−1 |
Speed of light in a vacuum |
c |
2.99792458 × 108 m/s |
Stefan-Boltzmann Constant |
Σ |
5.670373 × 10−8 W × m−2 × K−4 |