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Which of the following is not an isotope of hydrogen?(a) helium(b) protium(c) deuterium(d) tritiumI got this question during an online interview.I want to ask this question from Dihydrogen & H2 in portion Hydrogen of Chemistry – Class 11

Answer»

The correct CHOICE is (a) helium

To explain: Hydrogen exists in the form of three ISOTOPES namely protium, deuterium and TRITIUM. The atomic numbers of all the three isotopes of Hydrogen are same i.e. 1, but their symbols, RELATIVE atomic mass, density, etc vary.



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