What Is the Binding Energy (In J/mol or KJ/mol)of an Electron

question 22

Multiple Choice

What is the binding energy (in J/mol or kJ/mol) of an electron in a metal whose threshold frequency for photoelectrons is 2.50 × 10¹⁴ /s?

• A)2.75 × 10^-43 J/mol
• B)1.66 × 10^-19 J/mol
• C)1.20 × 10^-6 J/mol
• D)99.7 kJ/mol
• E)7.22 × 10¹⁷ kJ/mol

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Definitions:

Predictive Validity

The degree to which a measurement or test score forecasts future results on a connected outcome.

Concurrent Validity

A measure of how well a particular test predicts outcomes based on comparison with other measures that are administered at the same time.

Face Validity

The extent to which a test appears to measure what it is supposed to measure, based on an informal and subjective evaluation.

Content Validity

The extent to which a test measures all aspects of the concept it intends to assess.