Constants > Physics > Subatomic Particles

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NAME SYMBOL VALUE
Electron Molar Mass M(e)
Me
5.485799110(12) × 10-7 kg mol-1
Electron Radius, Classical re 2.817940285(31) × 10-15 m
Electron Specific Charge -e/me -1.758819(62) × 1011 C kg-1
Electron to Shielded Helion Magnetic Moment Ratio (gas, sphere, 25°C) µe/µ'h 864.058255(10) 
Electron to Shielded Proton Magnetic Moment Ratio (H2O, sphere, 25°C) µe/µ'p -658.2275954(71) 
Electron-α-Particle Mass Ratio me/mα 1.3709335611(29) × 10-4 
Electron-Deuteron Magnetic Moment Ratio µed -2143.923498(23) 
Electron-Deuteron Mass Raio me/md 2.7244371170(58) × 10-4 
Electron-Muon Magnetic Moment Ratio µeµ 206.7669720(63) 
Electron-Muon Mass Ratio me/mµ 4.83633210(15) × 10-3 

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