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To convert proton masses to kg: multiply by 1.67262192369 × 10⁻²⁷.
mp ≈ 1,836 × mₑ ≈ 1.00728 u. About 0.1% heavier than a neutron.
For example, 1 Proton Mass (mp) = 0.5002482479 Deuteron Mass (md).
| Proton Mass (mp) | Deuteron Mass (md) |
|---|---|
| 0.1 | 0.05002482479 |
| 0.5 | 0.2501241239 |
| 1 | 0.5002482479 |
| 2 | 1.000496496 |
| 5 | 2.501241239 |
| 10 | 5.002482479 |
| 25 | 12.5062062 |
| 50 | 25.01241239 |
| 100 | 50.02482479 |
| 500 | 250.1241239 |
| 1000 | 500.2482479 |
The proton mass is the rest mass of a proton, approximately 1.673 × 10⁻²⁷ kilograms or about 938.3 MeV/c².
mp ≈ 1,836 × mₑ ≈ 1.00728 u. About 0.1% heavier than a neutron.
To convert proton masses to kg: multiply by 1.67262192369 × 10⁻²⁷.
Nuclear energy calculations, radiation therapy dosimetry, and proton beam therapy for cancer.
A proton's mass is mostly from the kinetic energy of quarks and gluons (via E=mc²), not from the quark masses themselves (~1%).
Assuming quarks make up most of the proton's mass — quarks contribute only ~1%. The rest is binding energy.
The proton:electron mass ratio (1,836:1) is a fundamental number in physics. It determines atomic structure.
The deuteron mass is the mass of a deuterium nucleus (one proton + one neutron), approximately 3.344 × 10⁻²⁷ kilograms.
md < mp + mn by 2.224 MeV/c² (the binding energy). This 'mass defect' represents nuclear binding energy.
To convert deuteron masses to kg: multiply by 3.3435837724 × 10⁻²⁷.
Fusion energy research (deuterium-tritium and deuterium-deuterium reactions), NMR/MRI, and neutron production targets.
The deuteron's binding energy (2.224 MeV) is quite small, making it the most weakly bound stable nucleus.
Assuming md = mp + mn exactly — the mass defect (binding energy) makes the deuteron slightly lighter than the sum.
The deuteron is the simplest nucleus with more than one nucleon. Its binding energy (2.224 MeV) is E=mc² in action.



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