Question

current attempt in progress
which one of the following orbitals is the largest?
○ 2p
○ 3d
○ 3s
○ 1s
○ 4d

Explanation:

The size of an orbital is mainly determined by the principal quantum number ($n$). The higher the value of $n$, the larger the orbital. Among the given options, the $4d$ orbital has the highest principal - quantum number ($n = 4$). Orbitals with a higher $n$ value are farther from the nucleus and thus larger in size.

Answer:

E. 4d