explain the dependence of charge o mass ratio of protons on nature of gases in cathode ray ube
Ajay Choudhury , 8 Years ago
Grade 11
Physical Chemistry> explain the dependence of charge o mass r...
1 AnswersVikas TU
Last Activity: 8 Years ago
When H2 was used the smallest e/m detected was that of the proton with charge +1. That means that the proton, or H^+ was detected when hydrogen gas was used in the discharge tube.
When He gas is used then the ions produced will be He^+and He^2+. The mass-to-charge of the He^+ will be four times greater than the mass-to charge of H^+ produced when hydrogen gas is used. The mass-to-charge of the He^2+ will be twice as great if the ion is detected in the discharge tube. The amount of +2 ion (He^2+) formed will be small compared to the amount of the +1 ion (He^+) because it is easier to knock off one electron from the He atom than two electrons.
The above reasons help explain why the proton e/m depends on the gas used compared to the e/m value found for the electron.
When He gas is used then the ions produced will be He^+and He^2+. The mass-to-charge of the He^+ will be four times greater than the mass-to charge of H^+ produced when hydrogen gas is used. The mass-to-charge of the He^2+ will be twice as great if the ion is detected in the discharge tube. The amount of +2 ion (He^2+) formed will be small compared to the amount of the +1 ion (He^+) because it is easier to knock off one electron from the He atom than two electrons.
The above reasons help explain why the proton e/m depends on the gas used compared to the e/m value found for the electron.
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