The sum of the number of neutrons and protons in the isotopes of hydrogen is:

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Solution

The correct option is A 6
In tritium nucleus there is one proton and 2 neutrons
$∴ n + p = 3$
In deuterium nucleus there is one proton and one neutron
$∴ n + p = 2$
In protium nucleus there is one proton and no neutron
$∴ n + p = 1$
Total $= 3 + 2 + 1 = 6$

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The sum of the number of neutrons and protons in an isotopes of hydrogen is:

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