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Atomic weight of Ne is 20.02 . Ne is mixture of Ne20 and Ne22 relative , abundance of heavier isotope is ; (1) 90 (2) 20 (3) 40 (4) 10
there is some discrepancy in the question. If the atomic weight of neon given in the question is 20.2 then your answer is option 4]10.please check it because 20x+22[100-x]/100 =20.220x+2200-22x =2020180-2x =02x=180x =90 %if x= 90%then abundance of heaver isotope is 100-x =100-90= 10% if 20.02 then20x+22[100-x]/100 =20.0220x+2200-22x =2002198-2x =0then on solving for xx= 99%then abundance of heavier isotope is 100-99=1%please check your question if the weight given is 20.2 or 20.02 please approve my answer
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