Radon-222 Has a Half-Life of 3

question 45

Multiple Choice

Radon-222 has a half-life of 3.82 days. How many alpha emissions are produced when a 10 g sample of radon-222 decays over 19.1 days?

• A)3.39 × 10²⁰ emissions
• B)8.47 × 10²⁰ emissions
• C)5.42 × 10²¹ emissions
• D)2.62 × 10²² emissions
• E)4.18 × 10²⁵ emissions

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Definitions:

Total Utility

The total satisfaction received by a consumer from consuming a certain amount of a good or service.

Marginal Utility

The change in satisfaction or utility derived by consuming an additional unit of a good or service.

Indifference Curves

Indifference curves are graphical representations used in microeconomics to show combinations of two goods among which a consumer is indifferent, reflecting their preferences and consumption choices.

Marginal Utility

The change in satisfaction or utility that a person receives from consuming an additional unit of a good or service.