How do you measure the weight of a electron?

Question

How did they come up with a formula and what is it?

Answer 1

The charge-to-mass ratio of the electron is determined by measuring its response to a constant magnetic field. The electron's path will describe an arc of a circle, the radius of which is determined by the velocity (energy) of the electron and the strength of the magnetic field. This is actually done with a stream of electrons generated in the same fashion as that in a CRT. Presumably you already know the charge, so you divide the charge by the ratio to get the mass.

Answer 2

Once you know the magnitude of charge for an electron, mass will determined by how much the electron will be deflected in a magnetic field. There are other ways also.

Answer 3

First you need yo measure the charge to mass ratio, e/m. I think Thompson did this. Next you need to measure the charge on the electron. Millikan's experiment. Divide e/m by e then take the reciprocal.

Answer 4

you know the cathode ray experiment....
from that they have observe that the cathode ray is consists of a particle of definite mass. from the speed of the particle (about one-tenth that of light), their charge, and their deflection in a magnetic field of known strength, the mass of electron has been calculated as 1/1838 that of the lightest known atom, the hydrogen atom. the value was 9.10938188 x 10^-31 kg.

best answer

Answer 5

Ask Chemistry Gurus.

Answer 6

Electron no mass but atom does!

Answer 7

electrons have no weight

Answer 8

Bet you can find this in a chemistry book, somewhere. . .

Answer 9

by reading your book you will find the answer.