Description of a proton using chart.
Classification | Baryon |
---|---|
Composition | 2 up quarks, 1 down quark |
Statistics | Fermionic |
Interactions | Gravity, Electromagnetic, Weak,Strong |
Symbol | p, p+, N+ |
Antiparticle | Antiproton |
Theorized | William Prout (1815) |
Discovered | Ernest Rutherford (1917–1919, named by him, 1920) |
Mass |
1.672621777(74)×10−27 kg
1.007276466812(90) u938.272046(21) MeV/c2 |
Mean lifetime | >2.1×1029 years (stable) |
Electric charge | +1 e 1.602176565(35)×10−19 C |
Charge radius | 0.8775(51) fm |
Electric dipole moment | <5.4×10−24 e·cm |
Electric polarizability | 1.20(6)×10−3 fm3 |
Magnetic moment |
1.410606743(33)×10−26 J·T−1
2.792847356(23) μN1.521032210(12)×10−3 μB |
Magnetic polarizability | 1.9(5)×10−4 fm3 |
Spin | 1⁄2 |
Isospin | 1⁄2 |
Parity | +1 |
Condensed | I(JP) = 1⁄2(1⁄2+) |
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