Atomic Units - Derived Atomic Units

Derived Atomic Units

Below are given a few derived units. Some of them have proper names and symbols assigned, as indicated in the table. kB is Boltzmann constant.

Derived atomic units
Dimension Name Symbol Expression Value in SI units Value in more common units
length Bohr radius 5.2917720859(36)×10−11 m 0.052918 nm=0.52918 Å
energy Hartree energy 4.35974417(75)×10−18 J 27.211 eV=627.509 kcal·mol−1
time 2.418884326505(16)×10−17 s
velocity 2.1876912633(73)×106 m·s−1
force 8.2387225(14)×10−8 N 82.387 nN=51.421 eV·Å−1
temperature 3.1577464(55)×105 K
pressure 2.9421912(19)×1013 Pa
electric field 5.14220652(11)×1011 V·m−1 5.14220652(11) GV·cm−1=51.4220652(11) V·Å−1

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