The electron (seembol:
e ⁻
) is a subatomic particle wi a negative elementary electric charge . ^[1] Electrons belang tae the first generation o the lepton pairticle faimily, ^[2] an are generally thoucht tae be elementary pairticles acause thay hae na kent components or substructur. ^[3] The electron haes a mass that is approximately 1/1836 that o the proton . ^[4] Quantum mechanical properties o the electron include an intrinsic angular momentum ( spin ) o a hauf-integer value in units o ħ , which means that it is a fermion . Bein fermions, na twa electrons can occupy the same quantum state, in accordance wi the Pauli exclusion principle . ^[2] Electrons an aa hae properties o baith pairticles an waves , an sae can collide wi ither pairticles an can be diffractit lik licht. Experiments wi electrons best demonstrate this duality acause electrons hae a tiny mass.

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