[[G. Johnstone Stoney]] (1874) et. al.
| discovered = [[J. J. Thomson]] (1897)
| symbol = {{SubatomicParticle|Electron}}, {{SubatomicParticle|beta-}}
| mass= 9,10938215(45) × 10<sup>-31</sup> kg{{br}}5,4857990943(23) × 10<sup>-4</sup> u{{br}}[1822,88850204(77)]<sup>−1</sup>&nbsp;u<ref group=cat>Penyebut versi pecahannya merupakan balikan nilai desimal (dengan ketidakpastian standar relatif 4,2 × 10<sup>-10</sup>).</ref>{{br}}0,510998910(13)MeV/c<sup>2</sup>
| electric_charge = −1&nbsp;[[muatan elementer|e]]<ref group=cat>Muatan elektron adalah negatif [[muatan elementer]] yang memiliki nilai positif untuk proton.</ref>{{br}}-1,602176487(40) × 10<sup>-19</sup> C
| magnetic_moment = −1,001<span style="margin-left:0.25em">159</span><span style="margin-left:0.25em">652</span><span style="margin-left:0.25em">181</span><span style="margin-left:0.25em">11</span>&nbsp;[[Magneton Bohr|μ<sub>B</sub>]]
| spin = {{frac|1|2}}
}}
'''Elektron''' adolah [[fisika partikel|partikel]] subatom nan bamuatan negatif dan umumnyo ditulih sabagai '''e<sup>-</sup>'''. Elektron indak punyo komponen dasa ataupun substruktur apapun nan dikatahui, sahinggo inyo dipicayoi sabagai [[partikel elementer]].<ref name="prl50">{{cite journal
|last=Eichten|first=Estia J.
|title=New Tests for Quark and Lepton Substructure
|journal=Physical Review Letters|year=1983
|volume=50|pages=811–814|issue=11
|doi=10.1103/PhysRevLett.50.811
|last2=Peskin
|first2=Michael E.
}}</ref><ref>{{cite journal
|last=Gabrielse|first=G.
|title=New Determination of the Fine Structure Constant from the Electron ''g'' Value and QED
|journal=Physical Review Letters|year=2006
|volume=97|pages=030802(1–4)
|doi=10.1103/PhysRevLett.97.030802
|last2=Hanneke
|first2=D.
|last3=Kinoshita
|first3=T.
|last4=Nio
|first4=M.
|last5=Odom
|first5=B.}}</ref> Elektron punyo [[massa]] sakitar 1/1836 massa [[proton]].<ref name=nist_codata_mu>{{cite web
|url=http://physics.nist.gov/cgi-bin/cuu/Value?mpsme
|title=CODATA value: proton-electron mass ratio
|series=2006 CODATA recommended values|publisher=National Institute of Standards and Technology|accessdate=2009-07-18}}</ref><ref>{{cite book
|last=Zombeck|first=Martin V.|year=2007
|title=Handbook of Space Astronomy and Astrophysics
|publisher=Cambridge University Press|page=14
|edition=3rd|isbn=0521782422|url=http://books.google.com/books?id=tp_G85jm6IAC&pg=PA14}}</ref> Pengukuran astronomi menunjukkan bahwa [[rasio massa proton terhadap elektron]] tetap bernilai sama paling tidak selama setengah [[usia alam semesta]], seperti yang diprediksikan oleh Model Standar.<ref>{{cite journal
|last=Murphy|first=Michael T.
|title=Strong Limit on a Variable Proton-to-Electron Mass Ratio from Molecules in the Distant Universe
|journal=Science|date=2008-06-20|volume=320
|issue=5883|pages=1611–1613|url=http://www.sciencemag.org/cgi/content/abstract/320/5883/1611|accessdate=2008-09-03
|doi=10.1126/science.1156352
|pmid=18566280
|last2=Flambaum
|first2=VV
|last3=Muller
|first3=S
|last4=Henkel
|first4=C}}</ref> [[Momentum sudut]] ([[spin]]) instrinsik elektron adolah satangah nilai integer dalam satuan [[konstanta Planck|''ħ'']], nan barati bahasonyo inyo tamasuk [[fermion]]. [[Antipartikel]] elektron disabuik sabagai [[positron]], nan identik jo elektron, tapi bamuatan positif. Katiko sabuah elektron batumbuakan jo [[positron]], kaduonyo kamungkinan dapek saliang [[hamburan Bhabha|bahambua]] ataupun [[pemusnahan|musnah]] total, manghasilkan sapasang (atau labiah) [[foton]] [[sinar gama]].