What is the relationship between natural abundance and stability?

Natural abundance is directly proportional to stability. More is the natural abundance, more is the stability.

Explanation: Natural abundance refers to the abundance of isotopes of a chemical element which are naturally found on earth.

The isotopes which are more stable are more abundant as compared to the ones which are less stable. As the less stable ones will have small value of half life and thus would decompose more readily to more stable products by radioactive decay.

Uranium exists as three naturally occuring isotopes; , and   with natural abundance of about 99%, 0.7% and 0.005% respectively. Thus is the most stable isotope of Uranium and has highest natural abundance.

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the answer is third world countries, take for instance china, they restricted each family with only one child,

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since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.