Definition:Electron/Mass

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Mass of Electron

The mass of the electron is given as:

\(\ds m_\E\) \(\approx\) \(\ds 9 \cdotp 10938 \, 37015 \, (28) \times 10^{-31}\) kilograms \(\quad\) This sequence is A081801 in the On-Line Encyclopedia of Integer Sequences (N. J. A. Sloane (Ed.), 2008).
\(\ds \) \(\approx\) \(\ds 9 \cdotp 10938 \, 37015 \, (28) \times 10^{-28}\) grams \(\quad\) This sequence is A081801 in the On-Line Encyclopedia of Integer Sequences (N. J. A. Sloane (Ed.), 2008).
\(\ds \) \(\approx\) \(\ds 5 \cdotp 48579 \, 90906 \, 5(16) \times 10^{-4}\) daltons \(\quad\) This sequence is A003672 in the On-Line Encyclopedia of Integer Sequences (N. J. A. Sloane (Ed.), 2008).


Symbol

$m_\E$

The symbol for the electron mass is $m_\E$.


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


Also known as

The mass of the electron is also known as:

  • the electronic rest mass
  • the electron rest mass.


Sources

which gives the mantissas of these figures as:
$9 \cdotp 109 \, 558$ with an uncertainty of $\pm 54$ corresponding to the $2$ least significant figures
$5 \cdotp 485 \, 930$ with an uncertainty of $\pm 34$ corresponding to the $2$ least significant figures