Final answer:
The noble gas electron configuration for nickel (28) is [Ar] 4s² 3d⁸. The orbital diagram for nickel can be drawn by representing each orbital as a box and filling them with the appropriate number of electrons.
Step-by-step explanation:
The noble gas electron configuration for nickel (28) is [Ar] 4s² 3d⁸. This means that the electron configuration for nickel can be represented by the noble gas argon (Ar) followed by the remaining electrons in the 4s and 3d orbitals.
The orbital diagram for nickel (28) can be drawn by representing each orbital as a box and filling them with the appropriate number of electrons. The 4s orbital will have 2 electrons, the 3d orbital will have 8 electrons, and the remaining orbitals will be empty.