Question

question 19 of 30 what is the value of the quantum number n for a spin-down electron in a 2s orbital? a. 0 b. +1 c. +2 d. -\frac{1}{2}

Explanation:

The principal quantum number \( n \) is determined by the energy level or shell of the orbital. For a \( 2s \) orbital, the number before the orbital letter (here, \( 2 \)) represents the principal quantum number \( n \). The spin - down property relates to the spin quantum number, not the principal quantum number \( n \). So we just look at the "2" in \( 2s \) to find \( n \).

Answer:

C. +2