$α$ particles used in Rutherford's experiments are heavy particles.

positively charged

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negatively charged

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neutral

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Solution

The correct option is A positively charged
Alpha particle consists of two neutrons and two protons, and is thus identical to the nucleus of a helium atom. The rest mass of the alpha particle amounts to 4 a.m.u which equals to about 6.644× $10^{- 27}$ kg and its charge is +2e i.e. twice of a proton

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Similar questions

α

(a) Which metal did Rutherford select for his $α$ particle scattering experiment and why?

(b) What do you think would be the observation of $α -$ particle scattering experiment if carried out on

(i) heavy nucleus like platinum

(ii) light nuclei like lithium.

β

α

α

60^{\circ}

5 \times 10^{6}

α

120^{\circ}

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