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प्रश्न
A nucleus of an atom consists of 146 neutrons and 95 protons. It decays after emitting an alpha particle. How many protons and neutrons are left in the nucleus after an alpha emission?
पर्याय
protons = 93, neutrons = 142
protons = 95, neutrons = 144
protons = 93, neutrons = 144
protons = 95, neutrons = 142
MCQ
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उत्तर
Protons = 93, neutrons = 144
Explanation:
An α-particle contains 2 protons and 2 neutrons. After its emission, protons left = 95 − 2 = 93, and neutrons left = 146 − 2 = 144.
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