= Electron
{title2=$e^-$}
{wiki}
The <electron> is an electrically charged <elementary particle> in the <lepton> family. It has <electric charge> $-e$, <spin> $1/2$ and rest mass $m_e$. The <Positron> is its <antiparticle>, with the same mass and opposite charge.
In an atom, <atomic orbitals> describe <electron> <quantum states> rather than tiny classical planetary trajectories. In a material, mobile <electrons> carry current and can respond to applied <electric fields> and <magnetic fields>. An <electron gun> produces a directed beam whose deflection and interactions make <electron> imaging and scattering experiments possible. A recorded spot is a detection event; the propagation amplitudes that predict its probability can still interfere.
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