What are the charge,mass,and charge-to-mass ratio of an electron?

(N/A) The charge of an electron $(e)$ is $-1.6022 \times 10^{-19} \ C$.
The mass of an electron $(m_{e})$ is $9.10939 \times 10^{-31} \ kg$.
The charge-to-mass ratio is calculated as $\frac{e}{m_{e}}$.
$\frac{e}{m_{e}} = \frac{-1.6022 \times 10^{-19} \ C}{9.10939 \times 10^{-31} \ kg} = 1.758820 \times 10^{11} \ C \ kg^{-1}$.