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Question

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

A
Alpha particles are negatively charged species
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B
Alpha particles are positively charged species
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C
Alpha particles emitted by radioactive elements are used
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D
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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