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प्रश्न
The nucleus of an atom contains 20 protons. If its mass number is 41, find the number of neutrons in it.
अति संक्षिप्त उत्तर
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उत्तर
The number of neutrons is the mass number minus the number of protons: 41 − 20 = 21. Therefore, the nucleus contains 21 neutrons.
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