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The Bohr radius (a0 or rBohr) is a physical constant, approximately equal to the most probable distance between the proton and electron in a hydrogen atom in its ground state. It is named after Niels Bohr, due to its role in the Bohr model of an atom. Its value is 5.2917721067×10^−11 m.
A unit of length used to measure nuclear distances, = 10−15 meter. Named for the Italian physicist Enrico Fermi (1901–1954). Now obsolete, replaced by the SI term femtometer (symbol, fm); 1 fermi = 1 femtometer.
In relation to the base unit of [length] => (meters), 1 Bohr Radius (Bohr) is equal to 5.29177E-11 meters, while 1 Fermi (fermi) = 1.0E-15 meters.| 1 Bohr Radius | to common length units |
|---|---|
| 1 Bohr | = 5.29177E-11 meters (m) |
| 1 Bohr | = 5.29177E-14 kilometers (km) |
| 1 Bohr | = 5.29177E-9 centimeters (cm) |
| 1 Bohr | = 1.7361450131234E-10 feet (ft) |
| 1 Bohr | = 2.083374015748E-9 inches (in) |
| 1 Bohr | = 5.7871500437445E-11 yards (yd) |
| 1 Bohr | = 3.2881534339458E-14 miles (mi) |
| 1 Bohr | = 5.593245957087E-27 light years (ly) |
| 1 Bohr | = 2.0000393070916E-7 pixels (PX) |
| 1 Bohr | = 3.30735625E+24 planck length (pl) |
| Bohr Radius | to Fermi (table conversion) |
|---|---|
| 1 Bohr | = 52917.7 fermi |
| 2 Bohr | = 105835.4 fermi |
| 3 Bohr | = 158753.1 fermi |
| 4 Bohr | = 211670.8 fermi |
| 5 Bohr | = 264588.5 fermi |
| 6 Bohr | = 317506.2 fermi |
| 7 Bohr | = 370423.9 fermi |
| 8 Bohr | = 423341.6 fermi |
| 9 Bohr | = 476259.3 fermi |
| 10 Bohr | = 529177 fermi |
| 20 Bohr | = 1058354 fermi |
| 30 Bohr | = 1587531 fermi |
| 40 Bohr | = 2116708 fermi |
| 50 Bohr | = 2645885 fermi |
| 60 Bohr | = 3175062 fermi |
| 70 Bohr | = 3704239 fermi |
| 80 Bohr | = 4233416 fermi |
| 90 Bohr | = 4762593 fermi |
| 100 Bohr | = 5291770 fermi |
| 200 Bohr | = 10583540 fermi |
| 300 Bohr | = 15875310 fermi |
| 400 Bohr | = 21167080 fermi |
| 500 Bohr | = 26458850 fermi |
| 600 Bohr | = 31750620 fermi |
| 700 Bohr | = 37042390 fermi |
| 800 Bohr | = 42334160 fermi |
| 900 Bohr | = 47625930 fermi |
| 1000 Bohr | = 52917700 fermi |
| 2000 Bohr | = 105835400 fermi |
| 4000 Bohr | = 211670800 fermi |
| 5000 Bohr | = 264588500 fermi |
| 7500 Bohr | = 396882750 fermi |
| 10000 Bohr | = 529177000 fermi |
| 25000 Bohr | = 1322942500 fermi |
| 50000 Bohr | = 2645885000 fermi |
| 100000 Bohr | = 5291770000 fermi |
| 1000000 Bohr | = 52917700000 fermi |
| 1000000000 Bohr | = 52917700000000 fermi |