Identify the isotope/s of Helium.
Correct answer: E. Both A and B
- A. 3He2
- B. 4He2
- C. 6He2
- D. 5He2
- E. Both A and B
Explanation
There are two isotopes of helium: 3He2, which is a primordial isotope that was incorporated in Earth as it accreted, and 4He2, an isotope produced by radioactive decay of U and Th isotopes.
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