how to find charge on the electron?

Answer 1

It is a constant at NEGATIVE 1.602 x 10^19 coulomb

Answer 2

The classic experiment to do this involved spraying drops of oil into an area between charged plates. This area could be seen under a microscope.

The oil drops may be presumed to have an integer number of excess electrons.

The acceleration of an object is proportional to the force acting on it. The force acting on a charged particle by another charge is proportional to the charge. So, the acceleration of the oil drops when the plates get turned on may be presumed to be proportional to the charge on the oil drop.

Thompson performed this experiment thousands and thousands of times. He measured the time it took various oil drops to fall from one line to the next and then turned on the plates and timed them being pulled back up across the same lines. By doing this, he was able to determine how much force was acting on them.

He noticed that the amount of force differed, but it always differed by a discrete amount. The smallest difference in the force had to be the difference caused by 1 electron.

Answer 3

I presume you're asking how one does an experiment to measure it, not what book to look it up in.

Find a physics book that talks about Millikan's oil drop experiment. (probably on the web, too). In this experiment, tiny droplets of oil are allowed to drop in an electric field, and by measuring how strong the field needs to be to stop the drop from falling, you can essentially measure the charge on an electron.

Answer 4

well the proton is positive, and since electrons orbits around the nucleus which is full of positive protons and neutral neutrons, then the only reason that electrons does not leave orbit proves that it has a negative charge since protons keep electrons in orbit like opposite poles of a magnet

Answer 5

ALL electrons are negatively charged

Answer 6

- charge by definition @ 1.602 x 10^19 coulomb

Get yourself this book CRC Handbook of Chemistry and Physics, 87th Edition (Crc Handbook of Chemistry and Physics) (Hardcover)- I used mine for years as an engineer!

http://www.amazon.com/gp/product/0849304873/102-7495820-4949737?v=glance&n=283155

Answer 7

Most physics and chemistry books have a table of constants on the front or back cover. It should be listed there.

Answer 8

If you know the mass you can measure the deflection in a magnetic field.

try a cyclotron or mass spectrometer.
or see here;
http://en.wikipedia.org/wiki/Charge-to-mass_ratio

Answer 9

1.6021773349x10^-19 C