Final answer:
The correct electron configuration for gallium (Ga) is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p¹.
Step-by-step explanation:
The correct electron configuration for gallium (Ga) is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p¹. To determine the electron configuration, you start at the first energy level, which is Period 1, and fill the 1s subshell with 2 electrons. Then, you move to Period 2 and fill the 2s subshell with 2 electrons and the 2p subshell with 6 electrons. Finally, you move to Period 3 and fill the 3s subshell with 2 electrons, the 3p subshell with 6 electrons, and the 4s subshell with 2 electrons.