Why Are the Atomic Masses Listed in the Periodic Table

question 12

Multiple Choice

Why are the atomic masses listed in the periodic table not whole numbers?

• A)Scientists have yet to make the precise measurements.
• B)That would be too much of a coincidence.
• C)The atomic masses are average atomic masses.
• D)Today's instruments are able to measure the atomic masses to many decimal places.

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Definitions:

Predictive Validity

The ability of a test or other assessment tool to predict future characteristics or behaviors.

Interrater Reliability

A measure of the reliability of a test or of research results in which the consistency of evaluations across different judges is assessed. Also called interjudge reliability.

Severity

The degree to which something is severe or serious, used in various contexts to assess the intensity or seriousness of a condition, situation, or symptom.

Interventions

Actions taken to improve a particular situation, especially in the context of health, psychological, or educational problems.