Rajasthan BoardEnglish MediumSTD 9ScienceStructure of the Atom1 Mark
Question
How many neutrons are present in the nucleus hydrogen atom?
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Answer
Hydrogen exists as three different isotopes. $H_{-1}, H_{-2},$ and $H_{-3}. H_{-1}$ is hydrogen with a proton in the nucleus and exists in nature as $H_2.$ This is the most common form of hydrogen.
$H_{-2},$ also known as deuterium, has one proton and one neutron in its nucleus.
$H_{-3},$ also known as tritium, has one proton and two neutrons in its neucleus. Tritium is a radioactive isotope.
So while the most common form of hydrogen has no neutrons in its neucleus, other isotopes do.
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