A Certain Radioactive Isotope Has a Rate Constant of Decay

question 126

Multiple Choice

A certain radioactive isotope has a rate constant of decay of 2.90 × 10^-2 min^-1.Calculate the time required for a sample of this isotope to decay to one-fourth of its initial value.

• A) 23.9 min
• B) 29.9 min
• C) 0.0580 min
• D) 47.8 min
• E) 2.90 min

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Definitions:

Mitosis

A type of cell division in eukaryotic cells that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus.

Telomerase

An enzyme that adds nucleotide sequences to the ends of chromosomes, thereby preventing their shortening during cell division.

Malignant Cells

Abnormal cells that divide uncontrollably and have the potential to invade other tissues, leading to cancer.

Neoplasm

An abnormal growth of tissue, which can be benign or malignant, resulting from uncontrolled cell division.