Question

what is the e/m ratio of alpha particle

Answer 1

Alpha particle is a helium nucleus which consists two protons and two electrons. It has +2 charge and the mass of four protons. So the alpha particle has the least E/M because of its large mass.You can see that its E/M is equal to 1/2 time E/M of a proton.

Answer 2

Answer:

Explanation:

Alpha particle:

The structure of alpha particles, also known as alpha rays or alpha radiation, is similar to that of the helium-4 nucleus and is made up of two protons and two neutrons bonded together. They can also be created in various ways, although typically they are created during the alpha decay process. The Greek letter A serves as the inspiration for the name of the alpha particle. α The alpha particle's sign is α or α$2+$ They are also occasionally written as because they are the same as helium nuclei, $He2+$

We are aware of a proton's absolute charge $= +e$

And the absolute charge for alpha particles $= 2e$

The alpha particle's mass $= mass of two protons + mass of two neutrons = 4m$

Now for the particular charge of an alpha particle $= e/m = 2e/4m = e/2m$

We also know that,

$1e = 1.6*10^{-19C}$

$1m = 1.6 * 10^{-27 kg}$

$e/ m = [1.6*10^{-19}] / [2*1.6*10^{-27}]$

The charge of mass ratio e/m $= 4.8 * 10^{7} C/ kg$

Approximately $1:2$

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