Answer:
4d - orbital makes the given electronic configuration wrong.
Step-by-step explanation:
The order of electronic configuration is written as;
1s²
2s² 2p⁶
3s² 3p⁶ 3d¹⁰
4s² 4p⁶ 4d¹⁰ 4f¹⁴
5s² 5p⁶ 5d¹⁰ 5f¹⁴
6s² 6p⁶ 6d¹⁰ 6f¹⁴
7s² 7p⁶ 7d¹⁰ 7f¹⁴
In order of energy level from the lowest to the highest, the configuration of the given atom in ground state can be written as;
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹, when compared to the given configuration, 4d orbital makes the given configuration wrong, because the next orbital after 4s is 3d.