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

question 49

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)86.72371 amu
• B)86.8013 amu
• C)86.8220 amu
• D)86.8621 amu
• E)86.9085 amu

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Definitions:

Retina

The light-sensitive layer of tissue at the back of the inner eye, which converts light images into nerve signals sent to the brain.

Sensory Receptors

Specialized cells or structures in the body that respond to external stimuli, such as light, sound, touch, or chemicals, and send signals to the brain.

Sensation

The method through which our sense organs and nervous system detect and depict energy forms of stimuli from the surroundings.

Perception

The process by which individuals organize and interpret their sensory impressions to give meaning to their environment.