The complete electron configuration of nickel,element 28,is: A) [Ar] 3d¹⁰4s²4p⁵ B) [Kr] 3d¹⁰4s²4p⁴ C) [Ar] 3d⁹4s²4p⁶ D) [Ar] 3d¹⁰4p⁶5s² E) [Ar] 4s²4p²4d⁹

Question

Quizplus · Accepted Answer

Nickel has 28 electrons. The complete electron configuration can be determined by filling in the orbitals in order of increasing energy. The electron configuration of nickel is [Ar] 3d8 4s2. Rearranging the outer shell gives [Ar] 3d8 4s2. However, it is preferable to write the electron configuration using the noble gas shorthand, which is [Kr] 4d8 5s2. Choice B is the only option that matches this configuration.

The Complete Electron Configuration of Nickel,element 28,is