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The average atomic mass recorded on the periodic table for krypton is 83.80 u. This indicates that the most abundant isotope of krypton is

krypton-82.

krypton-83.

krypton-84.

krypton-85.

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The best and most correct answer among the choices provided by your question is the third choice.

Krypton-84 is the most abundant type of krypton.

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Answer : Option C) Krypton - 84

Explanation : The average atomic mass recorded on the periodic table for krypton is 83.80 u. This indicates that the most abundant isotope of krypton is Krypton - 84.

As the natural abundance of krypton - 84 is higher than the other isotopes of the krypton, which is 56.99 percent. This the most stable form of Kr that exists in nature. Rest other isotopes are not that readily available and also not that stable as compared to Krypton - 84.

Krypton - 83 has natural abundance as 11.50 percent and krypton - 82 has natural abundance 11.59 percent.

So, this clearly explains that the most abundant krypton isotope is Krypton - 84.

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