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Discovery of Electrons

The weight of...

Question

The weight of alpha particle is ____ amu.

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Solution

Alpha particle is a positively charged particle consisting of 2 protons and 2 neutrons bound together.
So the weight will be 4 times as that of a proton (proton and neutron has approximately equal weight).
Thus their sum weight will be 4.001 amu.
Therefore, the weight of alpha particle is 4.001 amu.

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Similar questions

The weight of a proton is _____ amu.

Q. The alpha particles used by Rutherford for bombardind the gold foil:
(A) have a mass of 2 amu charge +4
(B) have a mass of 4 amu and charge +2
(C) have a mass of 4 amu and charge +4
(D) have a mass of 1 amu and charge +1
Among these question which one is correct.

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