Table of Atomic and Nuclear Constants
| Quantity | Symbol | Value (SI units) | Relative Standard Uncertainty | |
|---|---|---|---|---|
| Bohr radius | 5.291 772 1092(17) × 10−11 m | 3.2 × 10−9 | ||
| classical electron radius | 2.817 940 3267(27) × 10−15 m | 9.7 × 10−10 | ||
| electron mass | 9.109 382 91(40) × 10−31 kg | 4.4 × 10−8 | ||
| Fermi coupling constant | 1.166 364(5) × 10−5 GeV−2 | 4.3 × 10−6 | ||
| fine-structure constant | 7.297 352 5698(24) × 10−3 | 3.2 × 10−10 | ||
| Hartree energy | 4.359 744 34(19) × 10−18 J | 4.4 × 10−8 | ||
| proton mass | 1.672 621 777(74) × 10−27 kg | 4.4 × 10−8 | ||
| quantum of circulation | 3.636 947 5520(24) × 10−4 m² s−1 | 6.5 × 10−10 | ||
| Rydberg constant | 10 973 731.568 539(55) m−1 | 5.0 × 10−12 | ||
| Thomson cross section | 6.652 458 734(13) × 10−29 m² | 1.9 × 10−9 | ||
| weak mixing angle | 0.2223(21) | 9.5 × 10−3 | ||
Read more about this topic: Physical Constant
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“Remember thee?
Ay, thou poor ghost, whiles memory holds a seat
In this distracted globe. Remember thee?
Yea, from the table of my memory
I’ll wipe away all trivial fond records,
All saws of books, all forms, all pressures past
That youth and observation copied there,
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