When an Element Has Z=10 and 10 Neutrons, What Element ${ }_{10}^{21} \mathrm{Ne}$

question 117

Multiple Choice

When an element has Z=10 and 10 neutrons, what element and isotope are present?

• A) \({ }_{10}^{21} \mathrm{Ne}\)
• B) \({ }_{10}^{20} \mathrm{Ne}\)
• C) \({ }_{20}^{10} \mathrm{Ca}\)
• D) \({ }_{10}^{10} \mathrm{Ca}\)

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Definitions:

Grandmother Hypothesis

A theory positing that the presence and assistance of post-menopausal women, especially grandmothers, can significantly increase the survival rates of their grandchildren, thereby influencing human evolution.

Life-history Hypothesis

A theory that explains how natural selection operates on traits that affect an organism's life cycle, such as reproductive timing, growth, and survival.

Mean Reproductive Spans

The average duration between an individual's first and last reproductive events within a population.

Fitness Payoffs

Benefits in terms of reproductive success or survival that result from a specific trait or behavior in an organism, central to the concept of natural selection.