The electronic structure of zinc () is 2, 8, 18, 2. The electronic structure of gallium () will be — Atomic Structure Chemistry Question

💡 Solution & Explanation

Zinc's configuration is $[Ar] 3d^{10} 4s^2$. The next electron for Gallium ($Z=31$) goes into the 4p orbital, giving $[Ar] 3d^{10} 4s^2 4p^1$. The shells are K=2, L=8, M=18, N=3. Thus, the structure is 2, 8, 18, 3. Therefore, correct answer is C.