Which of These Elements Is a Nonmetal

question 31

Multiple Choice

Which of these elements is a nonmetal?

• A)Na
• B)Mg
• C)Cu
• D)K
• E)Cl

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Definitions:

Face Validity

The extent to which a test is subjectively viewed as covering the concept it purports to measure, often assessed through its appearance to non-experts.

Predictive Validity

The extent to which a score on a test or measurement accurately predicts future performance on a related task or behavior.

Concurrent Validity

The degree to which the results of a particular test or measurement correspond to those of a previously established measurement for the same construct.

Content Validity

The extent to which a test measures all aspects of the concept or construct it intends to assess, ensuring that the test is fully representative.