Which quantum number represents the main energy level of an electron?A.eB.lC.nD.m

Breakdown of the Problem

1. Identify the quantum numbers associated with electrons.
2. Determine which quantum number is specifically related to the main energy level.

Relevant Concepts

• The principal quantum number (n) indicates the main energy level of an electron.
• The angular momentum quantum number (l) represents the shape of the orbital.
• The magnetic quantum number (m) denotes the orientation of the orbital.
• The spin quantum number (s) specifies the spin orientation of the electron.

Analysis and Detail

• Quantum numbers are essential in understanding electron configurations in atoms.
• The principal quantum number (n) takes positive integer values (1, 2, 3, …), each representing a different energy level.
• Higher values of n correspond to energy levels that are further from the nucleus, indicating higher energy.

Verify and Summarize

Based on the definitions of the quantum numbers, it is clear that the principal quantum number $n$ signifies the main energy level of the electron. The other options do not pertain to this function.

Final Answer

The correct answer is C. n.