{"Quantity":"atomic unit of 1st hyperpolarizability ","Formula.latex":"$e^3a_0^3/E_{\\rm h}^2$ ","Value":3.20636e-53,"Standard.uncertainty":7.1e-61,"Relative.standard.uncertainty":2.2e-08,"Concise.form":3.20636e-53,"Unit":"C3 m3 J-2"}
{"Quantity":"atomic unit of 2nd hyperpolarizability ","Formula.latex":"$e^4a_0^4/E_{\\rm h}^3$ ","Value":6.23538e-65,"Standard.uncertainty":2.8e-72,"Relative.standard.uncertainty":4.4e-08,"Concise.form":6.23538e-65,"Unit":"C4 m4 J-3"}
{"Quantity":"atomic unit of action ","Formula.latex":"$\\hbar$ ","Value":1.05457e-34,"Standard.uncertainty":4.7e-42,"Relative.standard.uncertainty":4.4e-08,"Concise.form":1.05457e-34,"Unit":"J s"}
{"Quantity":"atomic unit of charge ","Formula.latex":"$e$ ","Value":1.60218e-19,"Standard.uncertainty":3.5e-27,"Relative.standard.uncertainty":2.2e-08,"Concise.form":1.60218e-19,"Unit":"C"}
{"Quantity":"atomic unit of charge density ","Formula.latex":"$e/a_0^3$ ","Value":1081202338000,"Standard.uncertainty":24000,"Relative.standard.uncertainty":2.2e-08,"Concise.form":1081202338240,"Unit":"C m-3"}
{"Quantity":"atomic unit of current ","Formula.latex":"$eE_{\\rm h}/\\hbar$ ","Value":0.00662,"Standard.uncertainty":1.5e-10,"Relative.standard.uncertainty":2.2e-08,"Concise.form":0.00662,"Unit":"A"}
{"Quantity":"atomic unit of electric dipole moment ","Formula.latex":"$ea_0$ ","Value":8.47835e-30,"Standard.uncertainty":1.9e-37,"Relative.standard.uncertainty":2.2e-08,"Concise.form":8.47835e-30,"Unit":"C m"}
{"Quantity":"atomic unit of electric field ","Formula.latex":"$E_{\\rm h}/ea_0$ ","Value":514220652000,"Standard.uncertainty":11000,"Relative.standard.uncertainty":2.2e-08,"Concise.form":514220652110,"Unit":"V m-1"}
{"Quantity":"atomic unit of electric field gradient ","Formula.latex":"$E_{\\rm h}/ea_0^2$ ","Value":9.7173619999999997e+21,"Standard.uncertainty":210000000000000,"Relative.standard.uncertainty":2.2e-08,"Concise.form":9.7173620020999996e+21,"Unit":"V m-2"}
{"Quantity":"atomic unit of electric polarizability ","Formula.latex":"$e^2a_0^2/E_{\\rm h}$ ","Value":1.64878e-41,"Standard.uncertainty":1.6e-50,"Relative.standard.uncertainty":9.7e-10,"Concise.form":1.64878e-41,"Unit":"C2 m2 J-1"}
{"Quantity":"atomic unit of electric potential ","Formula.latex":"$E_{\\rm h}/e$ ","Value":27.21139,"Standard.uncertainty":6e-07,"Relative.standard.uncertainty":2.2e-08,"Concise.form":27.21139,"Unit":"V"}
{"Quantity":"atomic unit of electric quadrupole moment ","Formula.latex":"$ea_0^2$ ","Value":4.48655e-40,"Standard.uncertainty":9.9e-48,"Relative.standard.uncertainty":2.2e-08,"Concise.form":4.48655e-40,"Unit":"C m2"}
{"Quantity":"atomic unit of energy ","Formula.latex":"$E_{\\rm h}$ ","Value":4.35974e-18,"Standard.uncertainty":1.9e-25,"Relative.standard.uncertainty":4.4e-08,"Concise.form":4.35974e-18,"Unit":"J"}
{"Quantity":"atomic unit of length ","Formula.latex":"$a_0$ ","Value":5.29177e-11,"Standard.uncertainty":1.7e-20,"Relative.standard.uncertainty":3.2e-10,"Concise.form":5.29177e-11,"Unit":"m"}
{"Quantity":"atomic unit of magnetic dipole moment ","Formula.latex":"$\\hbar e/m_{\\rm e}$ ","Value":1.8548e-23,"Standard.uncertainty":4.1e-31,"Relative.standard.uncertainty":2.2e-08,"Concise.form":1.8548e-23,"Unit":"J T-1"}
{"Quantity":"atomic unit of magnetic flux density ","Formula.latex":"$\\hbar/ea_0^2$ ","Value":235051.7464,"Standard.uncertainty":0.0052,"Relative.standard.uncertainty":2.2e-08,"Concise.form":235051.74645,"Unit":"T"}
{"Quantity":"atomic unit of magnetizability ","Formula.latex":"$e^2a_0^2/m_{\\rm e}$ ","Value":7.89104e-29,"Standard.uncertainty":1.3e-37,"Relative.standard.uncertainty":1.6e-09,"Concise.form":7.89104e-29,"Unit":"J T-2"}
{"Quantity":"atomic unit of mass ","Formula.latex":"$m_{\\rm e}$ ","Value":9.10938e-31,"Standard.uncertainty":4e-38,"Relative.standard.uncertainty":4.4e-08,"Concise.form":9.10938e-31,"Unit":"kg"}
{"Quantity":"atomic unit of momentum ","Formula.latex":"$\\hbar/a_0$ ","Value":1.99285e-24,"Standard.uncertainty":8.8e-32,"Relative.standard.uncertainty":4.4e-08,"Concise.form":1.99285e-24,"Unit":"kg m s-1"}
{"Quantity":"atomic unit of permittivity ","Formula.latex":"$e^2/a_0E_{\\rm h}$ ","Value":1.11265e-10,"Concise.form":1.11265e-10,"Unit":"F m-1"}
{"Quantity":"atomic unit of time ","Formula.latex":"$\\hbar/E_{\\rm h}$ ","Value":2.41888e-17,"Standard.uncertainty":1.2e-28,"Relative.standard.uncertainty":5e-12,"Concise.form":2.41888e-17,"Unit":"s"}
{"Quantity":"atomic unit of velocity ","Formula.latex":"$a_0E_{\\rm h}/\\hbar$ ","Value":2187691.26379,"Standard.uncertainty":0.00071,"Relative.standard.uncertainty":3.2e-10,"Concise.form":2187691.2638,"Unit":"m s-1"}
{"Quantity":"electron volt ","Formula.latex":"eV ","Value":1.60218e-19,"Standard.uncertainty":3.5e-27,"Relative.standard.uncertainty":2.2e-08,"Concise.form":1.60218e-19,"Unit":"J"}
{"Quantity":"natural unit of action ","Formula.latex":"$\\hbar$ ","Value":1.05457e-34,"Standard.uncertainty":4.7e-42,"Relative.standard.uncertainty":4.4e-08,"Concise.form":1.05457e-34,"Unit":"J s"}
{"Quantity":"natural unit of action in eV s ","Formula.latex":"$\\hbar$ ","Value":6.58212e-16,"Standard.uncertainty":1.5e-23,"Relative.standard.uncertainty":2.2e-08,"Concise.form":6.58212e-16,"Unit":"eV s"}
{"Quantity":"natural unit of energy ","Formula.latex":"$m_{\\rm e}c^2$ ","Value":8.18711e-14,"Standard.uncertainty":3.6e-21,"Relative.standard.uncertainty":4.4e-08,"Concise.form":8.18711e-14,"Unit":"J"}
{"Quantity":"natural unit of energy in MeV ","Formula.latex":"$m_{\\rm e}c^2$ ","Value":0.511,"Standard.uncertainty":1.1e-08,"Relative.standard.uncertainty":2.2e-08,"Concise.form":0.511,"Unit":"MeV"}
{"Quantity":"natural unit of length ","Formula.latex":"$\\lambdabar_{\\rm C}$ ","Value":3.86159e-13,"Standard.uncertainty":2.5e-22,"Relative.standard.uncertainty":6.5e-10,"Concise.form":3.86159e-13,"Unit":"m"}
{"Quantity":"natural unit of mass ","Formula.latex":"$m_{\\rm e}$ ","Value":9.10938e-31,"Standard.uncertainty":4e-38,"Relative.standard.uncertainty":4.4e-08,"Concise.form":9.10938e-31,"Unit":"kg"}
{"Quantity":"natural unit of momentum ","Formula.latex":"$m_{\\rm e}c$ ","Value":2.73092e-22,"Standard.uncertainty":1.2e-29,"Relative.standard.uncertainty":4.4e-08,"Concise.form":2.73092e-22,"Unit":"kg m s-1"}
{"Quantity":"natural unit of momentum in MeV/c ","Formula.latex":"$m_{\\rm e}c$ ","Value":0.511,"Standard.uncertainty":1.1e-08,"Relative.standard.uncertainty":2.2e-08,"Concise.form":0.511,"Unit":"MeV/c"}
{"Quantity":"natural unit of time ","Formula.latex":"$\\hbar/m_{\\rm e}c^2$ ","Value":1.28809e-21,"Standard.uncertainty":8.3e-31,"Relative.standard.uncertainty":6.5e-10,"Concise.form":1.28809e-21,"Unit":"s"}
{"Quantity":"Planck constant over 2 pi times c in MeV fm ","Formula.latex":"$ \\hbar c $ ","Value":197.32697,"Standard.uncertainty":4.4e-06,"Relative.standard.uncertainty":2.2e-08,"Concise.form":197.32697,"Unit":"MeV fm"}
{"Quantity":"speed of light in vacuum ","Formula.latex":"$ c,c_0 $ ","Value":299792458,"Concise.form":299792458,"Unit":"m s-1"}
{"Quantity":"unified atomic mass unit","Formula.latex":"${\\rm u}$","Value":1.66054e-27,"Standard.uncertainty":7.3e-35,"Relative.standard.uncertainty":4.4e-08,"Concise.form":1.66054e-27,"Unit":"kg"}