Above What Atomic Number Are There No Stable Isotopes of Any

question 14

Multiple Choice

Above what atomic number are there no stable isotopes of any element?

• A)20
• B)92
• C)83
• D)40
• E)89

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Definitions:

Random Variable

A variable whose possible values are numerical outcomes of a random phenomenon, used in probability and statistics to model randomness.

Expected Value

The anticipated value of a variable, calculated as the sum of all possible values each multiplied by the probability of its occurrence.

Variance

An indicator of the distance between values in a dataset, reflecting how much each value deviates from the average.

Random Variable

An entity whose outcomes are numerical and stem from a random process.