Why Might Helium Be Present Only in Small Amounts in the Atmosphere

question 46

Multiple Choice

Why might helium be present only in small amounts in the atmosphere?

• A)It is so light that it can escape the atmosphere.
• B)It is not found much in nature.
• C)It is not produced in nuclear transformations.
• D)It is too reactive and is quickly converted into minerals.
• E)none of the above

---

Definitions:

Risk-free Return

The theoretical return on an investment with zero risk of financial loss, often represented by the yield on government securities.

Defined Contribution Plan

A retirement plan where both the employee and employer contribute to an account, with the final benefit dependent on account performance.

Risk-free Return

The theoretical return on an investment with no risk of financial loss, typically less than the return on riskier investments.