Table of Common Physical Constants 1


Lasers

Series of different colored lasers. No matter the color, the speed of light is a constant. The speed of light is just one constant in this table of common constants. Credit: Pang Ka kit, Creative Commons

Here is a useful table of common constants. These physical constants appear time and again in chemistry and physics homework problems.

Why memorize them when you can just look them up.

I personally prefer to keep a sheet with these constants stuffed in the back of book. You can print up your own sheet with a PDF copy of the Table of Common Constants.

TABLE OF COMMON CONSTANTS

 Name  Symbol Value
Speed of light c 299792458 m⋅s-1
Charge of an electron e 1.602176565(35)×10−19 C
Universal gravitational constant G 6.67384(80)×10-11 N⋅m2/kg2
Planck’s constant h 6.626070040(81)×10−34 J⋅s
  h 4.135667662(25)×10−15 eV⋅s
Dirac’s constant ħ 1.054571800(13)×10−34 J⋅s
  ħ 6.582119514(40)×10−16 eV⋅s
Boltzmann’s constant k 1.3806488(13)×10−23 J⋅K-1
    8.6173324(78)×10−5 eV⋅K-1
Avogadro’s constant NA 6.022140857(74)×1023 mol−1
Faraday’s constant F 96485.3365(21) C⋅mol−1
Ideal gas constant R 8.3144621(75) J⋅K−1⋅mol−1
Mass of an electron me 9.10938291(40)×10−31 kg
    0.510998928(11) MeV/c2
Mass of a proton mp 1.672621777(74)×10−27 kg
    938.272046(21) MeV/c2
Mass of a neutron mn 1.674927351(74)×10−27 kg
    939.565378(21) MeV/c2
Atomic mass unit u, amu or Da 1.660538921(73)×10−27 kg
    931.494061(21) MeV/c2
Permittivity of free space ε0 8.854187817×10−12
Coulomb’s constant 1/4πε0 8.9875517973681764×109 N⋅m2⋅C-2
Permeability of free space μ0 4π×10−7 N⋅A-2
Rydberg constant R 1.0973731568539(55)×10−7 m-1
Bohr radius a0 5.2917721092(17)×10−11 m

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