Which of the following statements are correct regarding the alpha particles used in the Rutherford's model?

Alpha particles are negatively charged species

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Alpha particles are positively charged species

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Alpha particles emitted by radioactive elements are used

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Alpha particles are electrically neutral

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Solution

The correct options are
B Alpha particles are positively charged species
C Alpha particles emitted by radioactive elements are used
Alpha particles are nothing but helium nucleus.
When electrons are removed from a helium atom, only two protons are left in its nucleus which makes it positively charged. The alpha particles emmited from radioactive elements are used in Rutherford's experiment.

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