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Question 1) Which two elements (besides H and He) exhibit prominent positive anomalies with respect to...

Question 1)

Which two elements (besides H and He) exhibit prominent positive anomalies with respect to their abundance in the solar system? Explain why these elements have usually high abundances relative to their neighbor?

Question 2)

Check the abundance of Ar and determine whether it is greater than expected. If so, suggest an explanation

Question 3)

Are there any stable isotope of Np? Why or why not?

Question 4)

How have the abundances of H and He in the universe changed since the big bang?

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Answer #1

Q1.

answer:

Because of affinity to chondritic meteorites. Thulium and Chlorine are present in positive amount in solar system.

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