Rank the following particles, from largest to smallest in mass: alpha particle, beta particle, proton.
alpha particle, beta particle, proton
beta particle, proton, alpha particle
proton, alpha particle, beta particle
alpha particle, proton, beta particle

alpha particle, proton, beta particle

Explanation:

Protons are fundamental sub-atomic particles present inside the nucleus of an atom. The mass of a proton is around  1 amu (atomic mass unit).

Alpha (α) and beta (β) particles are by products of radioactive decay. Alpha particles are essentially a composite of 2 protons and 2 neutrons similar to the He nucleus. Therefore, the have a mass of 4 amu

Beta particles are high energy particles which can either be electrons (negative charge) or positron (positive charge). They have a mass which is 1/2000th the mass of a proton.

Therefore, the mass from the largest to the smallest would be:

alpha > proton > beta

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