Physical Constants - INI

[item.speed-of-light]
code=c
slug=speed-of-light
name=Speed of light in vacuum
description=The propagation speed of light in vacuum.
symbol=c
uncertainty=exact
unit=m s^-1
value=299792458

[item.planck-constant]
code=h
slug=planck-constant
name=Planck constant
description=The fundamental constant of quantum mechanics.
symbol=h
uncertainty=exact
unit=J Hz^-1
value=6.62607015e-34

[item.reduced-planck-constant]
code=h-bar
slug=reduced-planck-constant
name=Reduced Planck constant
description=Planck constant divided by 2π.
symbol=ℏ
uncertainty=exact
unit=J s
value=1.054571817e-34

[item.gravitational-constant]
code=G
slug=gravitational-constant
name=Newtonian constant of gravitation
description=The proportional constant in Newton's law of universal gravitation.
symbol=G
uncertainty=0.00015e-11
unit=m^3 kg^-1 s^-2
value=6.67430e-11

[item.avogadro-constant]
code=Na
slug=avogadro-constant
name=Avogadro constant
description=The number of particles in one mole.
symbol=N_A
uncertainty=exact
unit=mol^-1
value=6.02214076e23

[item.elementary-charge]
code=e
slug=elementary-charge
name=Elementary charge
description=The magnitude of charge carried by an electron.
symbol=e
uncertainty=exact
unit=C
value=1.602176634e-19

[item.boltzmann-constant]
code=k
slug=boltzmann-constant
name=Boltzmann constant
description=The conversion factor between temperature and energy.
symbol=k
uncertainty=exact
unit=J K^-1
value=1.380649e-23

[item.fine-structure-constant]
code=alpha
slug=fine-structure-constant
name=Fine-structure constant
description=A dimensionless constant representing the strength of electromagnetic interaction.
symbol=α
uncertainty=0.0000000011e-3
unit=
value=7.2973525643e-3

[item.electron-mass]
code=me
slug=electron-mass
name=Electron mass
description=The rest mass of an electron.
symbol=m_e
uncertainty=0.0000000028e-31
unit=kg
value=9.1093837139e-31

[item.proton-mass]
code=mp
slug=proton-mass
name=Proton mass
description=The rest mass of a proton.
symbol=m_p
uncertainty=0.00000000052e-27
unit=kg
value=1.67262192595e-27

[item.neutron-mass]
code=mn
slug=neutron-mass
name=Neutron mass
description=The rest mass of a neutron.
symbol=m_n
uncertainty=0.00000000085e-27
unit=kg
value=1.67492750056e-27

[item.molar-gas-constant]
code=R
slug=molar-gas-constant
name=Molar gas constant
description=The constant in the ideal gas law equation.
symbol=R
uncertainty=exact
unit=J mol^-1 K^-1
value=8.314462618

[item.stefan-boltzmann-constant]
code=sigma
slug=stefan-boltzmann-constant
name=Stefan-Boltzmann constant
description=The constant representing total radiated energy density of blackbody radiation.
symbol=σ
uncertainty=exact
unit=W m^-2 K^-4
value=5.670374419e-8

[item.rydberg-constant]
code=R-inf
slug=rydberg-constant
name=Rydberg constant
description=The constant describing spectral lines of hydrogen atoms.
symbol=R_∞
uncertainty=0.000012
unit=m^-1
value=10973731.568157

[item.bohr-radius]
code=a0
slug=bohr-radius
name=Bohr radius
description=The average distance of the electron in the ground state of a hydrogen atom.
symbol=a_0
uncertainty=0.00000000082e-11
unit=m
value=5.29177210544e-11

[item.bohr-magneton]
code=muB
slug=bohr-magneton
name=Bohr magneton
description=The natural unit of electron magnetic moment.
symbol=μ_B
uncertainty=0.0000000029e-24
unit=J T^-1
value=9.2740100657e-24

[item.nuclear-magneton]
code=muN
slug=nuclear-magneton
name=Nuclear magneton
description=The natural unit of nucleon magnetic moment.
symbol=μ_N
uncertainty=0.0000000016e-27
unit=J T^-1
value=5.0507837393e-27

[item.faraday-constant]
code=F
slug=faraday-constant
name=Faraday constant
description=The charge of one mole of electrons.
symbol=F
uncertainty=exact
unit=C mol^-1
value=96485.33212

[item.standard-acceleration-of-gravity]
code=g
slug=standard-acceleration-of-gravity
name=Standard acceleration of gravity
description=The standard acceleration due to gravity at Earth's surface.
symbol=g
uncertainty=exact
unit=m s^-2
value=9.80665