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NEETChemistryStructure of Atom

What is the principal quantum number, and what does it determine for an atomic orbital?

Options

  1. AIt is a negative integer, and it determines the orbital shape.
  2. BIt is a positive integer, and it determines the orbital size and energy.
  3. CIt is a fractional number, and it determines the orbital's color.
  4. DIt is a complex number, and it determines the orbital's orientation.

Correct answer

B. It is a positive integer, and it determines the orbital size and energy.

Step-by-step solution

The principal quantum number 'n' is a positive integer (1, 2, 3, ...) that determines the size and, to a large extent, the energy of an atomic orbital. For hydrogen atoms and hydrogen-like species, the energy and size of the orbital depend only on the value of 'n.'

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