Free Quantum Numbers MCQs with Answers
66 Quantum Numbers MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
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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66 questions · page 4 of 4
- A. 4
- B. 5
- C. 6
- D. 9
Explanation: 'n' is referred to as the principal quantum number and 'l' is the azimuthal quantum number.
Correct answer: 9- A. mvr = nh
- B. mvr = nh/2π
- C. mvr = n/2π
- D. mvr = nh/π
Explanation: The correct relationship for the angular momentum of an electron in a hydrogen atom according to Bohr's atomic theory is mvr = nh/2π…
Correct answer: mvr = nh/2π- A. 12C
- B. 15N
- C. 16O
- D. 32S
Explanation: The spin is a quality of particles, it tells us the angular momentum (½) of an electron of a substance.
Correct answer: 15N- A. 3
- B. 6
- C. 5
- D. 7
Explanation: The principal quantum number (n) determines the number of sublevels in a given energy level.
Correct answer: 5- A. 1.6
- B. 1.3
- C. 3.1
- D. 6.1
Explanation: The electronic configuration of chlorine is [Ne]3s23p5, indicating that the last electron is in the 3p subshell.
Correct answer: 3.1- A. 1
- B. 3
- C. 5
- D. 7
Explanation: For the sub-shell with n-4 and l=3, the number of orientations is 7. This is because the number of orientations is given by 2l + 1.
Correct answer: 7