Radium-226 Is a Common Isotope on Earth,but Has a Half-Life

question 51

Multiple Choice

Radium-226 is a common isotope on Earth,but has a half-life of about 1600 years.Given that Earth is some 5 billions years old,why is there any radium at all?

• A)Radium-226 is one of several self-transmutating isotopes of the elements of the periodic table and is able to replenish itself so that it is never depleted.
• B)Radium-226 and Radium-218 undergo a series of transmutation reactions of alpha and beta decay to repeatedly become one another approximately every 1600 years.
• C)Radium-226 is a "daughter" isotope and the result of the radioactive decay of uranium.
• D)Radium-226 and Astatine-218 are converted back and forth via transmutation to one another at each of their respective half-life cycles.

Differentiate between true and false statements regarding medical facts and definitions.

Distinguish between units of measurement and their significance in the medical field.

Recognize the structure of medical terms and their components (root, prefix, suffix).

Understand and correctly use medical prefixes and their meanings.

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