The Decay of a Radionuclide with a Half- Life of 4.3

question 44

Multiple Choice

The decay of a radionuclide with a half- life of 4.3 × 10⁵ years has a rate constant (in yr^{- 1}) equal to
)

• A) 2.3 × 10^{- 6}.
• B) 1.6 × 10^{- 6}.
• C) 5.9 × 10^{- 8}.
• D) 6.2 × 10⁵.
• E) 2.8 × 10³.

---

Definitions:

Ictotest

A diagnostic test used specifically for detecting the presence of bilirubin in urine, which can indicate liver damage or disease.

Bilirubin

A yellow breakdown product of normal heme catabolism. Its levels are elevated in certain diseases, and it is responsible for the yellow color of bruises and the brown color of feces.

Ammonia

A colorless gas with a distinct sharp smell, commonly used in cleaning products and as a fertilizer, and also produced naturally in the human body.

Bacteria

Microscopic, single-celled organisms found everywhere in the environment, which can be either beneficial or harmful to humans and other living beings.