Question

What is the number of unpaired electrons in Ti in +3 state?

• A. 4
• B. 3
• C. 1
• D. Zero

Hint:

Always remove electrons from the highest "s" orbital first, then the "d" orbital.

Answer 1

The Correct Option is C

Step 1: Concept
The number of unpaired electrons depends on the electronic configuration of the ion.

Step 2: Meaning
Titanium (Ti) has an atomic number of 22. Its ground state configuration is $[Ar] 3d^2 4s^2$.

Step 3: Analysis
In the $\text{Ti}^{3+}$ state, the atom loses three electrons (two from $4s$ and one from $3d$). The configuration becomes $[Ar] 3d^1$. There is one electron in the $3d$ orbital.

Step 4: Conclusion
There is 1 unpaired electron in $\text{Ti}^{3+}$. Final Answer: (C)