Answer:
See explanation
Explanation:
The seventh transition element is Cobalt and the eight transition element is nickel.
Since there are eight d orbitals, we have to write the electronic configuration of Cobalt as;
[Ar] 3d9 4s0
For Nickel, we can write;
[Ar] 3d10 4s0
Note that the eight d orbitals can accommodate 16 electrons.