EASYMCQ SINGLEJEE Advanced ChemistryInorganic ChemistryMole conceptLaw of chemical combination, atomic & molecular mass, mole concept, calculations
An element, X, have three isotopes X 20, X 21 and X 22. The percentage abundance of X 20is 90% and its average atomic mass of the element is 20.11. The percentage abundance of X 21 should be
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Explanation
This question uses atomic structure & atomic mass. Relate mass, moles and number of particles using the mole concept and basic stoichiometry; doing the algebra gives the value listed in option A.
Atomic structure & atomic mass
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