1,000 electronvolts
1.602 × 10⁻¹⁶ JEnergy · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Energy
Just how much energy is 1,000 electronvolts?
Molecular
1,000 eV
ENERGY STORED OR TRANSFERRED
1,000 electronvolts
The quantity is exact as entered.
1.602 × 10⁻¹⁶ JEnergy
0
Hydrogen atom ground-state binding energy
Hydrogen atom ground-state binding energy is the energy needed to remove the electron from a hydrogen atom in its lowest energy state.
13.61 eVGround-state binding energy
0
Bar length represents energy. Equal energy does not imply the same temperature, power or usefulness.
A little perspective
1,000 electronvolts is about 73.5 times the ground-state binding energy of a hydrogen atom.
Measurements, assumptions & sources +
1,000 electronvolts
Energy: 1.602 × 10⁻¹⁶ J; definition.
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Hydrogen atom ground-state binding energy
Ground-state binding energy: 13.61 eV; recommended value.
The magnitude of the hydrogen ground-state binding energy is approximately 13.598 eV, or 2.1799 × 10⁻¹⁸ J. It is the energy required to ionise ground-state hydrogen, not a classical stored-energy shell.
NIST — Atomic spectra database ionization energies
The marked ground-state binding energy is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
Compare 1,000 electronvolts with the ground-state binding energy of a hydrogen atom. The notes below explain how each value was chosen.
Hydrogen atom ground-state binding energy
13.61 eVGround-state binding energy · recommended value
The magnitude of the hydrogen ground-state binding energy is approximately 13.598 eV, or 2.1799 × 10⁻¹⁸ J. It is the energy required to ionise ground-state hydrogen, not a classical stored-energy shell.
- Comparing
- Energy ↔ Ground-state binding energy
- Relative size
- 1,000 electronvolts is about 73.5 times the ground-state binding energy of a hydrogen atom.
How to read the visual
The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.
- The ground-state binding energy of a hydrogen atom: This is an illustrative comparison value, not a claim that every example is the same.
Energy is an amount; power describes the rate of energy transfer or use.
1.6022 × 10⁻¹⁶ Jjoules
4.4505 × 10⁻²³ kWhkilowatt-hours
3.8293 × 10⁻²⁰ kcalkilocalories
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