What does the principal quantum number (n) determine?
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A.
Size and energy of the orbital
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B.
Charge of the nucleus
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C.
Orientation of the orbital
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D.
Shape of the orbital
Correct Answer:
A. Size and energy of the orbital
Explanation:
The principal quantum number, symbolized as n, is a fundamental value in quantum mechanics that defines the primary energy level or shell of an electron within an atom. As the value of n increases, the electron is located further from the nucleus, resulting in a larger atomic orbital and a higher level of energy. Therefore, the principal quantum number essentially dictates the overall size and energy of the orbital.
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