{"symbol":"mal","quantity":"alpha particle mass","type":"Atomic and nuclear","value":6.64466e-27,"uncertainty":2e-36,"unit":"kg"}
{"symbol":"malc2","quantity":"alpha particle mass energy equivalent","type":"Atomic and nuclear","value":5.97192e-10,"uncertainty":1.8e-19,"unit":"J"}
{"symbol":"malc2mev","quantity":"alpha particle mass energy equivalent in MeV","type":"Atomic and nuclear","value":3727.37941,"uncertainty":1.1e-06,"unit":"MeV"}
{"symbol":"malu","quantity":"alpha particle mass in u","type":"Atomic and nuclear","value":4.00151,"uncertainty":6.3e-11,"unit":"u"}
{"symbol":"mmal","quantity":"alpha particle molar mass","type":"Atomic and nuclear","value":0.004,"uncertainty":1.2e-12,"unit":"kg/mol"}
{"symbol":"malsme","quantity":"alpha particle-electron mass ratio","type":"Atomic and nuclear","value":7294.29954,"uncertainty":2.4e-07,"unit":"1"}
{"symbol":"malsmp","quantity":"alpha particle-proton mass ratio","type":"Atomic and nuclear","value":3.9726,"uncertainty":2.2e-10,"unit":"1"}
{"symbol":"angstar","quantity":"Angstrom star","type":"X-ray values","value":1.00001e-10,"uncertainty":9e-17,"unit":"m"}
{"symbol":"u","quantity":"atomic mass constant","type":"Physico-chemical","value":1.66054e-27,"uncertainty":5e-37,"unit":"kg"}
{"symbol":"uj","quantity":"atomic mass constant energy equivalent","type":"Physico-chemical","value":1.49242e-10,"uncertainty":4.5e-20,"unit":"J"}
{"symbol":"muc2mev","quantity":"atomic mass constant energy equivalent in MeV","type":"Physico-chemical","value":931.4941,"uncertainty":2.8e-07,"unit":"MeV"}
{"symbol":"Rukg","quantity":"atomic mass unit-kilogram relationship","type":"Non-SI units","value":1.66054e-27,"uncertainty":5e-37,"unit":"kg"}
{"symbol":"auhypol","quantity":"atomic unit of 1st hyperpolarizability","type":"Non-SI units","value":3.20636e-53,"uncertainty":1.5e-62,"unit":"C^3*m^3/J^2"}
{"symbol":"au2hypol","quantity":"atomic unit of 2nd hyperpolarizability","type":"Non-SI units","value":6.23538e-65,"uncertainty":3.8e-74,"unit":"C^4*m^4/J^3"}
{"symbol":"Ahbar","quantity":"atomic unit of action","type":"Non-SI units","value":1.05457e-34,"uncertainty":0,"unit":"J*s"}
{"symbol":"Ae","quantity":"atomic unit of charge","type":"Non-SI units","value":1.60218e-19,"uncertainty":0,"unit":"C"}
{"symbol":"aucd","quantity":"atomic unit of charge density","type":"Non-SI units","value":1081202384570.0001,"uncertainty":490,"unit":"C/m^3"}
{"symbol":"aucur","quantity":"atomic unit of current","type":"Non-SI units","value":0.00662,"uncertainty":1.3e-14,"unit":"A"}
{"symbol":"auedm","quantity":"atomic unit of electric dipole moment","type":"Non-SI units","value":8.47835e-30,"uncertainty":1.3e-39,"unit":"C*m"}
{"symbol":"auefld","quantity":"atomic unit of electric field","type":"Non-SI units","value":514220674762.99994,"uncertainty":78,"unit":"V/m"}
{"symbol":"auefg","quantity":"atomic unit of electric field gradient","type":"Non-SI units","value":9.7173624291999969e+21,"uncertainty":2900000000000,"unit":"V/m^2"}
{"symbol":"auepol","quantity":"atomic unit of electric polarizability","type":"Non-SI units","value":1.64878e-41,"uncertainty":5e-51,"unit":"C^2*m^2/J"}
{"symbol":"auep","quantity":"atomic unit of electric potential","type":"Non-SI units","value":27.21139,"uncertainty":5.3e-11,"unit":"V"}
{"symbol":"aueqm","quantity":"atomic unit of electric quadrupole moment","type":"Non-SI units","value":4.48655e-40,"uncertainty":1.4e-49,"unit":"C*m^2"}
{"symbol":"Ahr","quantity":"atomic unit of energy","type":"Non-SI units","value":4.35974e-18,"uncertainty":8.5e-30,"unit":"J"}
{"symbol":"auforce","quantity":"atomic unit of force","type":"Non-SI units","value":8.23872e-08,"uncertainty":1.2e-17,"unit":"N"}
{"symbol":"Abohrrada0","quantity":"atomic unit of length","type":"Non-SI units","value":5.29177e-11,"uncertainty":8e-21,"unit":"m"}
{"symbol":"aumdm","quantity":"atomic unit of magnetic dipole moment","type":"Non-SI units","value":1.8548e-23,"uncertainty":5.6e-33,"unit":"J/T"}
{"symbol":"aumfd","quantity":"atomic unit of magnetic flux density","type":"Non-SI units","value":235051.75676,"uncertainty":0.00007,"unit":"T"}
{"symbol":"aumag","quantity":"atomic unit of magnetizability","type":"Non-SI units","value":7.89104e-29,"uncertainty":4.8e-38,"unit":"J/T^2"}
{"symbol":"Ame","quantity":"atomic unit of mass","type":"Non-SI units","value":9.10938e-31,"uncertainty":2.8e-40,"unit":"kg"}
{"symbol":"aumom","quantity":"atomic unit of momentum","type":"Non-SI units","value":1.99285e-24,"uncertainty":3e-34,"unit":"kg*m/s"}
{"symbol":"auperm","quantity":"atomic unit of permittivity","type":"Non-SI units","value":1.11265e-10,"uncertainty":1.7e-20,"unit":"F/m"}
{"symbol":"aut","quantity":"atomic unit of time","type":"Non-SI units","value":2.41888e-17,"uncertainty":4.7e-29,"unit":"s"}
{"symbol":"auvel","quantity":"atomic unit of velocity","type":"Non-SI units","value":2187691.26364,"uncertainty":0.00033,"unit":"m/s"}
{"symbol":"na","quantity":"Avogadro constant","type":"Physico-chemical, Adopted values","value":6.0221407599999999e+23,"uncertainty":0,"unit":"1/mol"}
{"symbol":"mub","quantity":"Bohr magneton","type":"Electromagnetic","value":9.27401e-24,"uncertainty":2.8e-33,"unit":"J/T"}
{"symbol":"mubev","quantity":"Bohr magneton in eV/T","type":"Electromagnetic","value":0.00006,"uncertainty":1.7e-14,"unit":"eV/T"}
{"symbol":"mubshhz","quantity":"Bohr magneton in Hz/T","type":"Electromagnetic","value":13996244936.1,"uncertainty":4.2,"unit":"Hz/T"}
{"symbol":"mubshcminv","quantity":"Bohr magneton in inverse meter per tesla","type":"Electromagnetic","value":46.68645,"uncertainty":1.4e-08,"unit":"1/m/T"}
{"symbol":"mubskk","quantity":"Bohr magneton in K/T","type":"Electromagnetic","value":0.67171,"uncertainty":2e-10,"unit":"K/T"}
{"symbol":"bohrrada0","quantity":"Bohr radius","type":"Atomic and nuclear","value":5.29177e-11,"uncertainty":8e-21,"unit":"m"}
{"symbol":"k","quantity":"Boltzmann constant","type":"Physico-chemical, Adopted values","value":1.38065e-23,"uncertainty":0,"unit":"J/K"}
{"symbol":"kev","quantity":"Boltzmann constant in eV/K","type":"Physico-chemical","value":0.00009,"uncertainty":0,"unit":"eV/K"}
{"symbol":"kshhz","quantity":"Boltzmann constant in Hz/K","type":"Physico-chemical","value":20836619120,"uncertainty":0,"unit":"Hz/K"}
{"symbol":"kshcminv","quantity":"Boltzmann constant in inverse meter per kelvin","type":"Physico-chemical","value":69.50348,"uncertainty":0,"unit":"1/K/m"}
{"symbol":"z0","quantity":"characteristic impedance of vacuum","type":"Universal","value":376.73031,"uncertainty":5.7e-08,"unit":"1"}
{"symbol":"re","quantity":"classical electron radius","type":"Atomic and nuclear","value":2.81794e-15,"uncertainty":1.3e-24,"unit":"m"}
{"symbol":"ecomwl","quantity":"Compton wavelength","type":"Atomic and nuclear","value":2.42631e-12,"uncertainty":7.3e-22,"unit":"m"}
{"symbol":"conqu2e2sh","quantity":"conductance quantum","type":"Electromagnetic","value":0.00008,"uncertainty":0,"unit":"S"}
{"symbol":"ampere90","quantity":"conventional value of ampere-90","type":"Electromagnetic","value":1,"uncertainty":0,"unit":"A"}
{"symbol":"charge90","quantity":"conventional value of coulomb-90","type":"Electromagnetic","value":1,"uncertainty":0,"unit":"C"}
{"symbol":"capacitance90","quantity":"conventional value of farad-90","type":"Electromagnetic","value":1,"uncertainty":0,"unit":"F"}
{"symbol":"inductance90","quantity":"conventional value of henry-90","type":"Electromagnetic","value":1,"uncertainty":0,"unit":"H"}
{"symbol":"kj90","quantity":"conventional value of Josephson constant","type":"Electromagnetic","value":483597900000000,"uncertainty":0,"unit":"Hz/V"}
{"symbol":"ohm90","quantity":"conventional value of ohm-90","type":"Electromagnetic","value":1,"uncertainty":0,"unit":"1"}
{"symbol":"volt90","quantity":"conventional value of volt-90","type":"Electromagnetic","value":1,"uncertainty":0,"unit":"V"}
{"symbol":"rk90","quantity":"conventional value of von Klitzing constant","type":"Electromagnetic","value":25812.807,"uncertainty":0,"unit":"1"}
{"symbol":"power90","quantity":"conventional value of watt-90","type":"Electromagnetic","value":1,"uncertainty":0,"unit":"W"}
{"symbol":"xucukalph1","quantity":"Copper x unit","type":"X-ray values","value":1.00208e-13,"uncertainty":2.8e-20,"unit":"m"}
{"symbol":"gdn","quantity":"deuteron g factor","type":"Atomic and nuclear","value":0.85744,"uncertainty":2.2e-09,"unit":"1"}
{"symbol":"mud","quantity":"deuteron magnetic moment","type":"Atomic and nuclear","value":4.33074e-27,"uncertainty":1.1e-35,"unit":"J/T"}
{"symbol":"mudsmub","quantity":"deuteron magnetic moment to Bohr magneton ratio","type":"Atomic and nuclear","value":0.00047,"uncertainty":1.2e-12,"unit":"1"}
{"symbol":"mudsmun","quantity":"deuteron magnetic moment to nuclear magneton ratio","type":"Atomic and nuclear","value":0.85744,"uncertainty":2.2e-09,"unit":"1"}
{"symbol":"md","quantity":"deuteron mass","type":"Atomic and nuclear","value":3.34358e-27,"uncertainty":1e-36,"unit":"kg"}
{"symbol":"mdc2","quantity":"deuteron mass energy equivalent","type":"Atomic and nuclear","value":3.00506e-10,"uncertainty":9.1e-20,"unit":"J"}
{"symbol":"mdc2mev","quantity":"deuteron mass energy equivalent in MeV","type":"Atomic and nuclear","value":1875.61294,"uncertainty":5.7e-07,"unit":"MeV"}
{"symbol":"mdu","quantity":"deuteron mass in u","type":"Atomic and nuclear","value":2.01355,"uncertainty":4e-11,"unit":"u"}
{"symbol":"mmd","quantity":"deuteron molar mass","type":"Atomic and nuclear","value":0.00201,"uncertainty":6.1e-13,"unit":"kg/mol"}
{"symbol":"rd","quantity":"deuteron rms charge radius","type":"Atomic and nuclear","value":2.12799e-15,"uncertainty":7.4e-19,"unit":"m"}
{"symbol":"mudsmuem","quantity":"deuteron-electron magnetic moment ratio","type":"Atomic and nuclear","value":-0.00047,"uncertainty":1.2e-12,"unit":"1"}
{"symbol":"mdsme","quantity":"deuteron-electron mass ratio","type":"Atomic and nuclear","value":3670.48297,"uncertainty":1.3e-07,"unit":"1"}
{"symbol":"mudsmunn","quantity":"deuteron-neutron magnetic moment ratio","type":"Atomic and nuclear","value":-0.44821,"uncertainty":1.1e-07,"unit":"1"}
{"symbol":"mudsmup","quantity":"deuteron-proton magnetic moment ratio","type":"Atomic and nuclear","value":0.30701,"uncertainty":7.9e-10,"unit":"1"}
{"symbol":"mdsmp","quantity":"deuteron-proton mass ratio","type":"Atomic and nuclear","value":1.99901,"uncertainty":1.1e-10,"unit":"1"}
{"symbol":"esme","quantity":"electron charge to mass quotient","type":"Atomic and nuclear","value":-175882001075.99997,"uncertainty":53,"unit":"C/kg"}
{"symbol":"gem","quantity":"electron g factor","type":"Atomic and nuclear","value":-2.00232,"uncertainty":3.5e-13,"unit":"1"}
{"symbol":"gammae","quantity":"electron gyromagnetic ratio","type":"Atomic and nuclear","value":176085963023,"uncertainty":53,"unit":"1/s/T"}
{"symbol":"gammaebar","quantity":"electron gyromagnetic ratio in MHz/T","type":"Atomic and nuclear","value":28024.95142,"uncertainty":8.5e-06,"unit":"MHz/T"}
{"symbol":"muem","quantity":"electron magnetic moment","type":"Atomic and nuclear","value":-9.28476e-24,"uncertainty":2.8e-33,"unit":"J/T"}
{"symbol":"ae","quantity":"electron magnetic moment anomaly","type":"Atomic and nuclear","value":0.00116,"uncertainty":1.8e-13,"unit":"1"}
{"symbol":"muemsmub","quantity":"electron magnetic moment to Bohr magneton ratio","type":"Atomic and nuclear","value":-1.00116,"uncertainty":1.8e-13,"unit":"1"}
{"symbol":"muemsmun","quantity":"electron magnetic moment to nuclear magneton ratio","type":"Atomic and nuclear","value":-1838.28197,"uncertainty":1.1e-07,"unit":"1"}
{"symbol":"me","quantity":"electron mass","type":"Atomic and nuclear","value":9.10938e-31,"uncertainty":2.8e-40,"unit":"kg"}
{"symbol":"mec2","quantity":"electron mass energy equivalent","type":"Atomic and nuclear","value":8.18711e-14,"uncertainty":2.5e-23,"unit":"J"}
{"symbol":"mec2mev","quantity":"electron mass energy equivalent in MeV","type":"Atomic and nuclear","value":0.511,"uncertainty":1.5e-10,"unit":"MeV"}
{"symbol":"meu","quantity":"electron mass in u","type":"Atomic and nuclear","value":0.00055,"uncertainty":1.6e-14,"unit":"u"}
{"symbol":"mme","quantity":"electron molar mass","type":"Atomic and nuclear","value":5.4858e-07,"uncertainty":1.7e-16,"unit":"kg/mol"}
{"symbol":"mesmalpha","quantity":"electron to alpha particle mass ratio","type":"Atomic and nuclear","value":0.00014,"uncertainty":4.5e-15,"unit":"1"}
{"symbol":"muemsmuhp","quantity":"electron to shielded helion magnetic moment ratio","type":"Atomic and nuclear","value":864.05826,"uncertainty":1e-05,"unit":"1"}
{"symbol":"muemsmupp","quantity":"electron to shielded proton magnetic moment ratio","type":"Atomic and nuclear","value":-658.2276,"uncertainty":7.2e-06,"unit":"1"}
{"symbol":"Revj","quantity":"electron volt-joule relationship","type":"Non-SI units","value":1.60218e-19,"uncertainty":0,"unit":"J"}
{"symbol":"muemsmud","quantity":"electron-deuteron magnetic moment ratio","type":"Atomic and nuclear","value":-2143.92349,"uncertainty":5.6e-06,"unit":"1"}
{"symbol":"mesmd","quantity":"electron-deuteron mass ratio","type":"Atomic and nuclear","value":0.00027,"uncertainty":9.6e-15,"unit":"1"}
{"symbol":"mesmh","quantity":"electron-helion mass ratio","type":"Atomic and nuclear","value":0.00018,"uncertainty":7.9e-15,"unit":"1"}
{"symbol":"muemsmumum","quantity":"electron-muon magnetic moment ratio","type":"Atomic and nuclear","value":206.76699,"uncertainty":4.6e-06,"unit":"1"}
{"symbol":"mesmmu","quantity":"electron-muon mass ratio","type":"Atomic and nuclear","value":0.00484,"uncertainty":1.1e-10,"unit":"1"}
{"symbol":"muemsmunn","quantity":"electron-neutron magnetic moment ratio","type":"Atomic and nuclear","value":960.9205,"uncertainty":0.00023,"unit":"1"}
{"symbol":"mesmn","quantity":"electron-neutron mass ratio","type":"Atomic and nuclear","value":0.00054,"uncertainty":2.6e-13,"unit":"1"}
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{"symbol":"mesmp","quantity":"electron-proton mass ratio","type":"Atomic and nuclear","value":0.00054,"uncertainty":3.3e-14,"unit":"1"}
{"symbol":"mesmtau","quantity":"electron-tau mass ratio","type":"Atomic and nuclear","value":0.00029,"uncertainty":1.9e-08,"unit":"1"}
{"symbol":"mesmt","quantity":"electron-triton mass ratio","type":"Atomic and nuclear","value":0.00018,"uncertainty":9e-15,"unit":"1"}
{"symbol":"e","quantity":"elementary charge","type":"Electromagnetic, Adopted values","value":1.60218e-19,"uncertainty":0,"unit":"C"}
{"symbol":"eshbar","quantity":"elementary charge over h-bar","type":"Electromagnetic","value":1519267446999999.8,"uncertainty":0,"unit":"A/J"}
{"symbol":"f","quantity":"Faraday constant","type":"Physico-chemical","value":96485.33212,"uncertainty":0,"unit":"C/mol"}
{"symbol":"gf","quantity":"Fermi coupling constant","type":"Atomic and nuclear","value":0.00001,"uncertainty":6e-12,"unit":"1/GeV^2"}
{"symbol":"alph","quantity":"fine-structure constant","type":"Atomic and nuclear","value":0.0073,"uncertainty":1.1e-12,"unit":"1"}
{"symbol":"c11strc","quantity":"first radiation constant","type":"Physico-chemical","value":3.74177e-16,"uncertainty":0,"unit":"m^2*W"}
{"symbol":"c1l","quantity":"first radiation constant for spectral radiance","type":"Physico-chemical","value":1.19104e-16,"uncertainty":0,"unit":"m^2*W/sr"}
{"symbol":"hr","quantity":"Hartree energy","type":"Atomic and nuclear","value":4.35974e-18,"uncertainty":8.5e-30,"unit":"J"}
{"symbol":"hrev","quantity":"Hartree energy in eV","type":"Atomic and nuclear","value":27.21139,"uncertainty":5.3e-11,"unit":"V"}
{"symbol":"ghn","quantity":"helion g factor","type":"Atomic and nuclear","value":-4.25525,"uncertainty":5e-08,"unit":"1"}
{"symbol":"muh","quantity":"helion magnetic moment","type":"Atomic and nuclear","value":-1.07462e-26,"uncertainty":1.3e-34,"unit":"J/T"}
{"symbol":"muhsmub","quantity":"helion magnetic moment to Bohr magneton ratio","type":"Atomic and nuclear","value":-0.00116,"uncertainty":1.4e-11,"unit":"1"}
{"symbol":"muhsmun","quantity":"helion magnetic moment to nuclear magneton ratio","type":"Atomic and nuclear","value":-2.12763,"uncertainty":2.5e-08,"unit":"1"}
{"symbol":"mh","quantity":"helion mass","type":"Atomic and nuclear","value":5.00641e-27,"uncertainty":1.5e-36,"unit":"kg"}
{"symbol":"mhc2","quantity":"helion mass energy equivalent","type":"Atomic and nuclear","value":4.49954e-10,"uncertainty":1.4e-19,"unit":"J"}
{"symbol":"mhc2mev","quantity":"helion mass energy equivalent in MeV","type":"Atomic and nuclear","value":2808.39161,"uncertainty":8.5e-07,"unit":"MeV"}
{"symbol":"mhu","quantity":"helion mass in u","type":"Atomic and nuclear","value":3.01493,"uncertainty":9.7e-11,"unit":"u"}
{"symbol":"mmh","quantity":"helion molar mass","type":"Atomic and nuclear","value":0.00301,"uncertainty":9.1e-13,"unit":"kg/mol"}
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{"symbol":"nucs","quantity":"hyperfine transition frequency of Cs-133","type":"Adopted values","value":9192631770,"uncertainty":0,"unit":"Hz"}
{"symbol":"alphinv","quantity":"inverse fine-structure constant","type":"Atomic and nuclear","value":137.036,"uncertainty":2.1e-08,"unit":"1"}
{"symbol":"invconqu","quantity":"inverse of conductance quantum","type":"Electromagnetic","value":12906.40372,"uncertainty":0,"unit":"1"}
{"symbol":"kjos","quantity":"Josephson constant","type":"Electromagnetic","value":483597848399999.94,"uncertainty":0,"unit":"Hz/V"}
{"symbol":"asil","quantity":"lattice parameter of silicon","type":"X-ray values","value":5.43102e-10,"uncertainty":8.9e-18,"unit":"m"}
{"symbol":"d220sil","quantity":"lattice spacing of ideal Si (220)","type":"X-ray values","value":1.92016e-10,"uncertainty":3.2e-18,"unit":"m"}
{"symbol":"n0","quantity":"Loschmidt constant (273.15 K, 100 kPa)","type":"Physico-chemical","value":2.6516458039999994e+25,"uncertainty":0,"unit":"1/m^3"}
{"symbol":"n0std","quantity":"Loschmidt constant (273.15 K, 101.325 kPa)","type":"Physico-chemical","value":2.6867801110000001e+25,"uncertainty":0,"unit":"1/m^3"}
{"symbol":"kcd","quantity":"luminous efficacy","type":"Adopted values","value":683,"uncertainty":0,"unit":"lm/W"}
{"symbol":"flxquhs2e","quantity":"magnetic flux quantum","type":"Electromagnetic","value":2.06783e-15,"uncertainty":0,"unit":"Wb"}
{"symbol":"r","quantity":"molar gas constant","type":"Physico-chemical","value":8.31446,"uncertainty":0,"unit":"J/K/mol"}
{"symbol":"mu","quantity":"molar mass constant","type":"Physico-chemical","value":0.001,"uncertainty":3e-13,"unit":"kg/mol"}
{"symbol":"mm12c","quantity":"molar mass of carbon-12","type":"Physico-chemical","value":0.012,"uncertainty":3.6e-12,"unit":"kg/mol"}
{"symbol":"nah","quantity":"molar Planck constant","type":"Physico-chemical","value":3.99031e-10,"uncertainty":0,"unit":"J/Hz/mol"}
{"symbol":"mvol","quantity":"molar volume of ideal gas (273.15 K, 100 kPa)","type":"Physico-chemical","value":0.02271,"uncertainty":0,"unit":"m^3/mol"}
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{"symbol":"mvolsil","quantity":"molar volume of silicon","type":"X-ray values","value":0.00001,"uncertainty":6e-13,"unit":"m^3/mol"}
{"symbol":"xumokalph1","quantity":"Molybdenum x unit","type":"X-ray values","value":1.0021e-13,"uncertainty":5.3e-20,"unit":"m"}
{"symbol":"mcomwl","quantity":"muon Compton wavelength","type":"Atomic and nuclear","value":1.17344e-14,"uncertainty":2.6e-22,"unit":"m"}
{"symbol":"gmum","quantity":"muon g factor","type":"Atomic and nuclear","value":-2.00233,"uncertainty":1.3e-09,"unit":"1"}
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{"symbol":"amu","quantity":"muon magnetic moment anomaly","type":"Atomic and nuclear","value":0.00117,"uncertainty":6.3e-10,"unit":"1"}
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{"symbol":"mumumsmun","quantity":"muon magnetic moment to nuclear magneton ratio","type":"Atomic and nuclear","value":-8.8906,"uncertainty":2e-07,"unit":"1"}
{"symbol":"mmu","quantity":"muon mass","type":"Atomic and nuclear","value":1.88353e-28,"uncertainty":4.2e-36,"unit":"kg"}
{"symbol":"mmuc2","quantity":"muon mass energy equivalent","type":"Atomic and nuclear","value":1.69283e-11,"uncertainty":3.8e-19,"unit":"J"}
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{"symbol":"Nhbar","quantity":"natural unit of action","type":"Non-SI units","value":1.05457e-34,"uncertainty":0,"unit":"J*s"}
{"symbol":"Nhbarev","quantity":"natural unit of action in eV s","type":"Non-SI units","value":6.58212e-16,"uncertainty":0,"unit":"eV*s"}
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{"symbol":"Necomwlbar","quantity":"natural unit of length","type":"Non-SI units","value":3.86159e-13,"uncertainty":1.2e-22,"unit":"m"}
{"symbol":"Nme","quantity":"natural unit of mass","type":"Non-SI units","value":9.10938e-31,"uncertainty":2.8e-40,"unit":"kg"}
{"symbol":"mec","quantity":"natural unit of momentum","type":"Non-SI units","value":2.73092e-22,"uncertainty":8.2e-32,"unit":"kg*m/s"}
{"symbol":"mecmevsc","quantity":"natural unit of momentum in MeV/c","type":"Non-SI units","value":0.511,"uncertainty":1.5e-10,"unit":"MeV/c"}
{"symbol":"nut","quantity":"natural unit of time","type":"Non-SI units","value":1.28809e-21,"uncertainty":3.9e-31,"unit":"s"}
{"symbol":"Nc","quantity":"natural unit of velocity","type":"Non-SI units","value":299792458,"uncertainty":0,"unit":"m/s"}
{"symbol":"ncomwl","quantity":"neutron Compton wavelength","type":"Atomic and nuclear","value":1.31959e-15,"uncertainty":7.5e-25,"unit":"m"}
{"symbol":"gnn","quantity":"neutron g factor","type":"Atomic and nuclear","value":-3.82609,"uncertainty":9e-07,"unit":"1"}
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{"symbol":"ku","quantity":"kelvin-atomic mass unit relationship","value":9.25109e-14,"uncertainty":2.8e-23,"unit":"u"}
{"symbol":"stp","quantity":"shielding difference of t and p in HT","value":2.414e-08,"uncertainty":2e-11,"unit":"1"}
{"symbol":"art","quantity":"triton relative atomic mass","value":3.0155,"uncertainty":1.2e-10,"unit":"1"}
{"symbol":"jkg","quantity":"joule-kilogram relationship","value":1.11265e-17,"uncertainty":0,"unit":"kg"}
{"symbol":"mutsmup","quantity":"triton to proton magnetic moment ratio","value":1.06664,"uncertainty":2.1e-09,"unit":"1"}