MagneticFluxQuantum is magnetic flux quantum, an electromagnetic constant.
MolarGasConstant is a physico-chemical constant.
MolarVolume is the volume occupied by a mole or a gram molecular weight of any gas measured at standard conditions.
MuonGFactor is the muon g-factor.
MuonMagneticMoment is the muon magnetic moment.
MuonMass
(Physical Constants Package Symbol) MuonMass is the mass of a muon.
NeutronComptonWavelength is the neutron Compton wavelength.
NeutronMagneticMoment is the neutron magnetic moment.
NeutronMass is the mass of a neutron.
PlanckMass is a universal constant.