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The nucleus of an atom contains 20 protons. If its mass number is 41, find the number of neutrons in it.

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Question

The nucleus of an atom contains 20 protons. If its mass number is 41, find the number of neutrons in it.

Very Short Answer
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Solution

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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Chapter 8: Journey Inside the Atom - Intext Questions [Page 150]

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NCERT Science Exploration [English] Class 9
Chapter 8 Journey Inside the Atom
Intext Questions | Q 11. | Page 150
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