Assertion :Binding energy (or mass defect) of hydrogen nucleus is zero. Reason: Hydrogen nucleus contain only one nucleon.
A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Nuclear binding energy can only arise when the nucleus contains at least two nucleons.
So hydrogen atom has indeed zero nuclear binding energy.
A hydrogen atom is made of one proton and one electron. Because hydrogen has one proton, it has an atomic number of one. It is the only element whose atoms don't have any neutrons.
The mass defect for hydrogen is zero, because this isotope has only one particle-a-proton in its nucleus and therefore there is no mass loss to binding energy of nuclear components