What Is the Principal Quantum Number of the Last Shell

question 54

Multiple Choice

What is the principal quantum number of the last shell for the element barium?

• A)5
• B)4
• C)3
• D)6
• E)2

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Definitions:

Four Humours

A historical medical theory postulating that health and temperament depend on the balance of blood, phlegm, yellow bile, and black bile in the body.

Psychological Abnormality

A condition characterized by thought, feeling, or behavior patterns considered outside societal norms, often leading to distress or impaired functioning.

Psychogenic Cause

A cause attributed to psychological factors rather than physiological origins.

Humours

In ancient and medieval physiology, it refers to the four bodily fluids (blood, phlegm, black bile, and yellow bile) thought to determine health and temperament.