The principal quantum number n of an electron determines its
Correct answer: B. main energy level and distance from the nucleus
- A. shape of orbital
- B. main energy level and distance from the nucleus
- C. orientation of the orbital in space
- D. direction of spin
Explanation
The principal quantum number sets the shell, and therefore the main energy level and the average distance of the electron from the nucleus. Orbital shape is given by the azimuthal quantum number l, orientation by the magnetic quantum number m, and spin by s, which takes the values plus or minus one half.
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About Quantum Numbers
Quantum numbers describe an electron's energy level, subshell, orbital orientation and spin. You examine the principal, azimuthal, magnetic and spin quantum numbers, their allowed values, orbital capacity and how they determine electronic configurations and distinguish electrons within an atom.
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