Definition:Electron/Radius

Radius of Electron

The actual size of the electron is still unknown.

The current best estimate is that its radius has an upper limit of the order of $10^{-22}$ metres.

Symbol

$r_\E$

The symbol for the electron radius is $r_\E$.

The $\LaTeX$ code for \(r_\E\) is r_\E .

Sources

• 1958: C.A. Coulson: Electricity (5th ed.) ... (previous) ... (next): Chapter $\text {I}$: Preliminary Survey: $\S 1$. Electrostatics
• 1964: Milton Abramowitz and Irene A. Stegun: Handbook of Mathematical Functions ... (previous) ... (next): $2$. Physical Constants and Conversion Factors: Table $2.3$ Adjusted Values of Constants

which gives $2 \cdotp 817 \, 939 \times 10^{-15} \, \mathrm m$, or ${} \times 10^{-13} \, \mathrm {cm}$, with an uncertainty in the mantissa of $\pm 13$ corresponding to the $2$ least significant figures