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

Jun 15, 2017

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