All the Disintegrations of a Sample of an Unknown Nuclide

question 49

Multiple Choice

All the disintegrations of a sample of an unknown nuclide weighing 4.6 × 10^-2 g were counted. In the first half-life of the sample, the total number of disintegrations counted was 4.3 × 10²⁰. What is the atomic weight of the unknown element?

• A)32 amu
• B)16 amu
• C)8 amu
• D)4 amu
• E)None of these choices are correct.

---

Definitions:

Powered Off

The state of an electronic device when it is not in operation and not consuming power; it is completely turned off.

Liberal Arts

An area of study that emphasizes a broad education in literature, philosophy, social and physical sciences, and mathematics rather than technical or professional training.

Career Counselor

A professional who provides guidance and advice to individuals on matters related to careers, education, and employment.

Academic Departments

Divisions within a college or university that specialize in a particular field of study.