Question

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

Answer 1

The mass-to-charge ratio `m/e` of electrons is `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 × 10^"-19"color(white)(l) "C"`, and the mass of an electron is `9.109 × 10^"-31"color(white)(l) "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"`.