Quantum number which tells the energy of electron is________________?
Correct answer: A. n
- A. n
- B. 1
- C. m
- D. s
Explanation
The principal quantum number, n, specifies the main energy level and is therefore the quantum number most directly associated with an electron’s energy. The symbols m and s refer to magnetic orientation and spin, respectively, not the principal energy level. Students may choose “l” or “1” because the azimuthal quantum number is often written as l, but the option shown as 1 is not the correct symbol.
Last updated
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.
Practise Atomic Structure
922 free Atomic Structure MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.