Rubidium Has Two Naturally Occurring Isotopes

question 17

Multiple Choice

Rubidium has two naturally occurring isotopes.The average mass of Rb is 85.4678 amu.If 72.15% of Rb is found as Rb-85 (84.9117 amu) ,what is the mass of the other isotope?

• A) 0.56 amu
• B) 85.68 amu
• C) 86.91 amu
• D) 86.02 amu
• E) 83.47 amu

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Definitions:

Genital Character

In psychoanalytic theory, a personality type that emerges during the genital stage of psychosexual development, characterized by the ability to form mature and mutual relationships.

Sexual Promiscuity

Engaging in sexual activities with multiple partners without committing to a monogamous relationship.

Pleasure Principle

A psychoanalytic concept describing the driving force behind human behavior to seek pleasure and avoid pain, primarily associated with the id.

Secondary Process

A term from psychoanalytic theory referring to the rational and conscious thought processes that are involved in problem solving and decision making.