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Question

Neutrons were discovered by:

A
Bombarding thin sheets of beryllium with alpha particles
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B
Bombarding thin sheets of calcium with beta particles
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C
By radiating X-rays on an alpha particle
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D
Bombarding thin sheets of calcium with alpha particles
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Solution

The correct option is A Bombarding thin sheets of beryllium with alpha particles
42He2++94Be126C+10n
Neutrons were discovered by the bombardment of alpha particles (42He2+) on a thin sheet of beryllium (94Be).


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