How Was the Mass of the Electron First Measured?

[Justryingtopasschem]

Could anyone on here tell me how the electron was first weighed. Like how did they find the mass of the electron? Please I need to know!

 

[ZapperZ]

Could anyone on here tell me how the electron was first weighed. Like how did they find the mass of the electron? Please I need to know!

Try looking for the Millikan Oil Drop experiment.

Zz.

 

[Justryingtopasschem]

okay..but will that help me.. i know he foudn out the charge with that...but the mass?

 

[dextercioby]

No,no,he found the mass.The mass/charge ratio had been found by J.J.Thomson in 1897...

Daniel.

 

[dextercioby]

And one moe thing,i know you're just trying to pass chemistry,but please do not double post/address the same question in different threads...

Unless you like seing double...

Daniel.

 

[Meir Achuz]

Thomson found e/m.
Millikan found e.
From the two measurements, m was deduced by division.

 

[Justryingtopasschem]

so they never really weighed it...

 

[dextercioby]

Yes,they did,it's called MASS SPECTROMETER...

Daniel.

 

[Justryingtopasschem]

omg I am so confused with this chem stuff...my teach told me to find out how they weighed the electron and proton for Xtra credit and nothing is comming up on google

 

[dextercioby]

Heres' how the weighing machine works

http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/maspec.html

http://www.chemguide.co.uk/analysis/masspec/howitworks.html

http://www.teachmetuition.co.uk/Chemistry/Atomic_Structure/atomic1.htm

http://www.geocities.com/thesciencefiles/mass/spectrograph.html

Daniel.

P.S.Did u check the famous Oil Drop Experiment...?

 

[Justryingtopasschem]

yeah we just learned about the oil drop experiment..that's only bout the charge isn't it