Which of the following is not a transition metal?

Question

Match List-I with List-II
\[ \begin{array}{|c|c|} \hline \text{List-I (Species)} & \text{List-II (Electronic distribution)} \\ \hline \text{(A) Cr}^{+2} & \text{(I) } 3d^8 \\ \text{(B) Mn}^{+} & \text{(II) } 3d^3 4s^1 \\ \text{(C) Ni}^{+2} & \text{(III) } 3d^4 \\ \text{(D) V}^{+} & \text{(IV) } 3d^5 4s^1 \\ \hline \end{array} \]

Answer 1

Step 1: Sort the elements by their block in the periodic table. Cu, Cr and Fe all lie in the first transition series (Group 3-12, d-block).
Step 2: Na sits in Group 1, the s-block, and its valence electron enters a 3s orbital, not a d orbital.
Step 3: The defining feature of a transition metal is an incomplete d-subshell in the element or one of its common ions; Na\(^+\) has the noble-gas configuration of neon with no d-electrons.
Step 4: Hence the odd one out is \[ \boxed{Na} \] which is option (iv).

Which of the following is not a transition metal?

Show Hint

The Correct Option is D

Solution and Explanation

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