The Isotope Has a Half-Life of 5,715 Years

question 6

Multiple Choice

The isotope has a half-life of 5,715 years. Given an initial amount of 11 grams of the isotope, how many grams will remain after 500 years? After 5,000 years? Round your answers to four decimal places.

• A) 7.2469 gm, 4.1988 gm
• B) 6.2117 gm, 3.5989 gm
• C) 10.3528 gm, 5.9982 gm
• D) 4.1411 gm, 2.3993 gm
• E) 12.4233 gm, 7.1979 gm

---

Definitions:

Mammary Glands

Specialized organs in mammals that produce milk to nourish newborns.

Dorsal Hollow Nerve Cord

A distinctive feature of chordates, forming the central nervous system's basis.

Endothermic Animals

Organisms that can regulate their body temperature through internal metabolic processes, often referred to as warm-blooded animals.

Four-Chambered Hearts

A heart structure consisting of two atria and two ventricles, found in mammals and birds, allowing for efficient oxygenation of blood.