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Describe how the three isotopes of hydrogen differ.
Perceived Market
The segment of a market that consumers are aware of or have a particular perception about, which may influence their purchasing decisions.
Pareto Efficient
A scenario in which it is impossible to improve the status of any individual or preference without adversely affecting at least one other individual or preference.
Negative Externalities
Costs suffered by a third party as a result of an economic transaction in which they were not involved, such as pollution.
Positive Externalities
Benefits that affect parties who did not choose to incur that benefit.
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