"In an atom no two electrons can have the same set of four Quantum numbers" is stated by:
Correct answer: C. Pauli's Exclusion principle
- A. Heisenberg's uncertainty principle
- B. Aufbau Principle
- C. Pauli's Exclusion principle
- D. Hund's Rule
- E. (n+1) Rule
Explanation
The set of numbers used to describe the position and energy of the electron in an atom are called quantum numbers. There are four quantum numbers namely, principal, azimuthal, magnetic and spin quantum numbers. Pauli's exclusion principle states that in an atom no two electrons can have the same set of four quantum numbers. Let us take example of electrons in Helium, both have all quantum numbers same except spin quantum number, one is clockwise and other is anti-clockwise.
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About Atomic Structure
Atomic structure covers the discovery of the proton, Planck's quantum theory, hydrogen emission spectra and the evidence for quantized energy levels. You will use quantum numbers to describe orbitals, distinguish s, p, d and f orbital shapes, and write electronic configurations, including the correct order of electron filling.
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