50 picometres
50 pmLength · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Length & distance
Just how long is 50 picometres?
Microscopic
50 pm
50 picometres
The quantity is exact as entered.
50 pmLength
0 - shared origin
Bohr radius
The Bohr radius is a fundamental physical constant representing the most probable distance between the nucleus and the electron in a hydrogen atom according to early quantum theory.
52.92 pmLength
0 - shared origin
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A little perspective
The Bohr radius is about 1.06 times 50 picometres.
Measurements, assumptions & sources +
50 picometres
Length: 50 pm; definition.
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Bohr radius
Length: 52.92 pm; measured constant.
A characteristic length in a model of hydrogen. It is not the fixed radius of every atom.
NIST — 2022 CODATA fundamental constants
The marked length is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
Compare 50 picometres with the Bohr radius. The notes below explain how each value was chosen.
Bohr radius
52.92 pmLength · measured constant
A characteristic length in a model of hydrogen. It is not the fixed radius of every atom.
- Comparing
- Length ↔ Length
- Relative size
- The Bohr radius is about 1.06 times 50 picometres. The Bohr radius is approximately 5.84% greater than 50 picometres.
How to read the visual
The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.
- The Bohr radius: This is a measured value; check the notes for its source and scope.
This comparison follows the selected length only; other dimensions may differ.
5 × 10⁻¹¹ mmetres
1.6404 × 10⁻¹⁰ ftfeet
3.1069 × 10⁻¹⁴ mimiles
3.3423 × 10⁻²² AUastronomical units
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