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8 September, 02:52

Which of these particles has the greatest mass? (1) alpha (3) neutron

(2) beta (4) positron

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  1. 8 September, 04:14
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    (1) alpha is your answer. The alpha particle is a Helium nucleus, with two protons and two neutrons. Therefore its larger than the positron or the neutron (because positrons have around the same mass as the proton, being its anti-particle). The beta particle is just the electron, in which the proton is way more massive than the electron.
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