<Table> Electron <Tr> <Td colspan="2"> Hydrogen atom orbitals at different energy levels . The brighter areas are where one is most likely to find an electron at any given time . </Td> </Tr> <Tr> <Th> Composition </Th> <Td> Elementary particle </Td> </Tr> <Tr> <Th> Statistics </Th> <Td> Fermionic </Td> </Tr> <Tr> <Th> Generation </Th> <Td> First </Td> </Tr> <Tr> <Th> Interactions </Th> <Td> Gravity , electromagnetic , weak </Td> </Tr> <Tr> <Th> Symbol </Th> <Td> , β </Td> </Tr> <Tr> <Th> Antiparticle </Th> <Td> Positron ( also called antielectron ) </Td> </Tr> <Tr> <Th> Theorized </Th> <Td> Richard Laming ( 1838 -- 1851 ) , G. Johnstone Stoney ( 1874 ) and others . </Td> </Tr> <Tr> <Th> Discovered </Th> <Td> J.J. Thomson ( 1897 ) </Td> </Tr> <Tr> <Th> Mass </Th> <Td> 6969910938355999999 ♠ 9.109 383 56 ( 11 ) × 10 kg 6996548579909069999 ♠ 5.485 799 090 70 ( 16 ) × 10 u ( 7003182288848450000 ♠ 1822. 888 4845 ( 14 ) ) u 6999510998946099999 ♠ 0.510 998 9461 ( 31 ) MeV / c </Td> </Tr> <Tr> <Th> Mean lifetime </Th> <Td> stable ( > 7036208280160000000 ♠ 6.6 × 10 yr ) </Td> </Tr> <Tr> <Th> Electric charge </Th> <Td> 3018839782351300000 ♠ − 1 e 3018839782337920000 ♠ − 1.602 176 6208 ( 98 ) × 10 C 3009519679549000000 ♠ − 4.803 204 51 ( 10 ) × 10 esu </Td> </Tr> <Tr> <Th> Magnetic moment </Th> <Td> − 1.001 159 652 180 91 ( 26 ) μ </Td> </Tr> <Tr> <Th> Spin </Th> <Td> 1 / 2 </Td> </Tr> <Tr> <Th> Weak isospin </Th> <Td> LH : − 1 / 2 , RH : 0 </Td> </Tr> <Tr> <Th> Weak hypercharge </Th> <Td> LH : - 1 , RH : − 2 </Td> </Tr> </Table>
<Table> Electron <Tr> <Td colspan="2"> Hydrogen atom orbitals at different energy levels . The brighter areas are where one is most likely to find an electron at any given time . </Td> </Tr> <Tr> <Th> Composition </Th> <Td> Elementary particle </Td> </Tr> <Tr> <Th> Statistics </Th> <Td> Fermionic </Td> </Tr> <Tr> <Th> Generation </Th> <Td> First </Td> </Tr> <Tr> <Th> Interactions </Th> <Td> Gravity , electromagnetic , weak </Td> </Tr> <Tr> <Th> Symbol </Th> <Td> , β </Td> </Tr> <Tr> <Th> Antiparticle </Th> <Td> Positron ( also called antielectron ) </Td> </Tr> <Tr> <Th> Theorized </Th> <Td> Richard Laming ( 1838 -- 1851 ) , G. Johnstone Stoney ( 1874 ) and others . </Td> </Tr> <Tr> <Th> Discovered </Th> <Td> J.J. Thomson ( 1897 ) </Td> </Tr> <Tr> <Th> Mass </Th> <Td> 6969910938355999999 ♠ 9.109 383 56 ( 11 ) × 10 kg 6996548579909069999 ♠ 5.485 799 090 70 ( 16 ) × 10 u ( 7003182288848450000 ♠ 1822. 888 4845 ( 14 ) ) u 6999510998946099999 ♠ 0.510 998 9461 ( 31 ) MeV / c </Td> </Tr> <Tr> <Th> Mean lifetime </Th> <Td> stable ( > 7036208280160000000 ♠ 6.6 × 10 yr ) </Td> </Tr> <Tr> <Th> Electric charge </Th> <Td> 3018839782351300000 ♠ − 1 e 3018839782337920000 ♠ − 1.602 176 6208 ( 98 ) × 10 C 3009519679549000000 ♠ − 4.803 204 51 ( 10 ) × 10 esu </Td> </Tr> <Tr> <Th> Magnetic moment </Th> <Td> − 1.001 159 652 180 91 ( 26 ) μ </Td> </Tr> <Tr> <Th> Spin </Th> <Td> 1 / 2 </Td> </Tr> <Tr> <Th> Weak isospin </Th> <Td> LH : − 1 / 2 , RH : 0 </Td> </Tr> <Tr> <Th> Weak hypercharge </Th> <Td> LH : - 1 , RH : − 2 </Td> </Tr> </Table>
what is the exact mass of an electron
what is the exact mass of an electron
9.109 383 56 ( 11 ) × 10 kg
9.109 383 56 ( 11 ) × 10 kg