What group of elements is most likely to contain elements that will be found in pure nature
2 answers:
Answer: Option (D) is the correct answer.
Explanation:
Noble gases are the elements that have completely filled orbitals.
For example, electronic configuration of neon is .
Therefore, they do not react at ordinary conditions with any other element in the atmosphere.
Hence, they exist in pure form in the nature.
Thus, we can conclude that group of noble gases of elements is most likely to contain elements that will be found in pure nature.
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Answer:
The abundance of first isotope is 69.15 %
The abundance of second isotope is 30.85 %
Explanation:
The formula for the calculation of the average atomic mass is:
Given that:
Since the element has only 2 isotopes, so the let the percentage of first be x and the second is 100 -x.
For first isotope:
% = x %
Mass = 62.9296 u
For second isotope:
% = 100 - x
Mass = 64.9278 u
Given, Average Mass = 63.546 u
Thus,
Solving for x, we get that:
x = 69.15 %
<u>The abundance of first isotope is 69.15 %</u>
<u>The abundance of second isotope is 100 - 69.15 % = 30.85 %</u>