MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryMole _ Equivalent ConceptPrevious Year Questions
An element, X has the following isotopic composition: 200X : 90% 199X : 8.0% 202X : 2.0% The weighted average atomic mass of the naturally occurring element X is closest to (AIPMT 2007)
A.201 amu
B.202 amu
C.199 amu
D.200 amu✓ Correct
Explanation
Average isotopic mass of X = 200 90 199 8 202 2 90 8 2 x x x 18000 1592 404 199.96amu 200amu 100
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