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Neon is naturally available as ""^(20)Ne...

Neon is naturally available as `""^(20)Ne and ""^(22)Ne` with average atomic mass 20.2. Calculate the relative abundance of heavier isotope.

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Let the percentage abundance of `""^(20)Ne` is x . The percentage abundance of `""^(20)Ne` is 100-x.
20.2=`((100-x)20+22x)/(100)`
Percent abundance of `""^(20)Ne` =10%
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