What is the mass-to-charge ratio of electrons?

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What is the mass-to-charge ratio of electrons?

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Answer 1 · 2017-06-15T20:29:22

The mass-to-charge ratio $\frac{m}{e}$ $m/e$ of electrons is $5.685 \times 10^{-12} l kg/C$ $5.685 × 10^"-12" color(white)(l)"kg/C"$ .

Explanation:

Chemists are more likely to talk about the charge-to-mass ratio of electrons.

The charge on an electron is $1.602 \times 10^{-19} l C$ $1.602 × 10^"-19"color(white)(l) "C"$ , and the mass of an electron is $9.109 \times 10^{-31} l kg$ $9.109 × 10^"-31"color(white)(l) "kg"$ .

∴ $\frac{e}{m} = \frac{1.602 \times 10^{-19} l C}{9.109 \times 10^{-31} l kg} = 1.759 \times 10^{-11} l C/kg$ $e/m = (1.602 × 10^"-19"color(white)(l) "C")/(9.109 × 10^"-31"color(white)(l) "kg") = 1.759 × 10^"-11"color(white)(l) "C/kg"$ .

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What is the mass-to-charge ratio of electrons?

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