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physico chemical constant comparison table

Subject	is named after	has proposal date	has unit	has uncertainty	has definition	has equation	has symbol	has value	has equivalent to	has approval date	has temperature	is an instance of	has pressure
atomic mass constant			kg	0.00000013 × 10-27 kg	One-twelfth the mean mass of an atom of carbon 12 (including the orbital electrons).		mu	1.66053873 × 10-27 kg		1961		mass
Avogadro number	Amadeo Avogadro			0.00000047 × 1023 mol-1	The number of atoms in 12 grams of carbon 12. The number of atoms in a gram-atom (mass in grams numerically equal to the atomic weight) or the number of molecules in a gram-molecule (mass in grams numerically equal to the molecular weight).		NA	6.02214199 × 1023 mol-1				physico chemical constant
Boltzmann constant				0.0000024 × 10-23 J K-1	The constant of proportionality relating the mean kinetic energy of an atom to its absolute temperature.		k	1.3806503 × 10-23 J K-1	molar gas constant divided by the Avogadro number			physico chemical constant
Faraday constant				0.0039 C mol-1			F	96485.3415 C mol-1				physico chemical constant
first radiation constant				0.00000029 × 10-16 W m2			c1	3.74177107 × 10-16 W m2				physico chemical constant
Loschmidt constant	J. Loschmidt (1821-1895)	1865		0.0000047 × 1025 m-3	This is the number of molecules in a cubic metre of an ideal gas at s.t.p. It is equal to the Avogadro constant divided by the molar volume. In Germany it is sometimes called Avogadro's constant.		n0	2.6867775 × 1025 m-3			273.15 K	physico chemical constant	101.325 kPa
molar gas constant				0.000015 J mol-1 K-1			R	8.314472 J mol-1 K-1				physico chemical constant
molar volume of ideal gas				0.000039 × 10-3 m3 mol-1			Vm	22.413996 × 10-3 m3 mol-1			273.15 K	physico chemical constant	101.325 kPa
Sackur-Tetrode constant				0.0000044			S0/R	-1.1648678			1 K	physico chemical constant	101.325 kPa
second radiation constant				0.0000025 × 10-2 m K			c2	1.4387752 × 10-2 m K				physico chemical constant
Stefan-Boltzmann constant				0.000040 × 10-8 W m-2 K-4	A constant relating the energy radiated by a black body to its absolute temperature and incorporated in the Stefan-Boltzmann radiation law which states that the energy radiated per unit time is given by σ(T4 - T40), where σ is the Stefan-Boltzmann constant and T and T0 are the absolute temperatures of the body and its surroundings expressed in kelvins.		σ	5.670400 × 10-8 W m-2 K-4				physico chemical constant
Wien displacement law constant				0.0000051 × 10-3 m K			b	2.8977686 × 10-3 m K				physico chemical constant

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