Question

5. The alpha particles used by Rutherford for
bombarding 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​

Answer 1

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b) $\alpha$ particles have A mass of 4amu and charge of 2 units positive charge