Rubidium Consists of Two Naturally Occurring Isotopes Rubidium-85 and Rubidium-87

question 28

Multiple Choice

Rubidium consists of two naturally occurring isotopes rubidium-85 and rubidium-87. Rubidium-85 (⁸⁵Rb) has an isotopic mass of 84.9117 amu and a 72.15% abundance. Rubidium-87(⁸⁷Rb) has a 27.85% abundance. The atomic weight of rubidium is 85.4768 amu. Determine the isotopic mass of ⁸⁷Rb?

• A) 86. 7237  amu
• B) 86.8013 amu
• C) 86.8220 amu
• D) 86.8621 amu
• E) 86.9411 amu

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Definitions:

Electronics Test

An examination or procedure designed to assess the functionality and performance of electronic devices.

Probability

A measure of the likelihood or chance that a certain event will occur, expressed as a number between 0 and 1, where 0 indicates impossibility and 1 indicates certainty.

Uniform Distribution

A type of probability distribution in which all outcomes are equally likely; each variable has the same probability of occurring.

Electronics Test

The process of using test equipment to evaluate the performance, functionality, and quality of electronic devices and components.