Write doen the number of 3d electrons in each of the following ions: `Ti^(2+),V^(2+),Cr^(3+),Mn^(2+),Fe^(2+),Fe^(2+),Co^(2+),Ni^(2+)` and `Cu^(2+)` indicate how would you expect the five 3d orbitals to be occupied for these hydrated ions (octahedral).

Explanation

To determine the number of 3d electrons in the given ions, we first need to know the electronic configurations of the neutral atoms and then adjust for the ionization that occurs when forming the ions.

1. **Titanium (Ti)**
- Atomic number: 22
- Electronic configuration: [Ar] 3d² 4s²
- For Ti²⁺: Remove 2 electrons (from 4s)
- 3d electrons in Ti²⁺: **2**

...