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Write the ground-state electron configuration of a lead atom.
Depression
A mental health issue involving a perpetual state of sorrow or disinterest in engaging activities, markedly interfering with daily existence.
Ethical Standards
Principles that govern behavior based on notions of right and wrong.
Variables
Elements, features, or factors that are liable to vary or change.
Sample Size
The number of participants or observations included in a study, which can affect the reliability and validity of the research results.
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