MCQ practice · SSC Chemistry Board questions · Chapter 4: Periodic Table
Which is a transition element?
Think it through first, then pick an option.
- a Mn
- b K
- c Ca
- d Al
Answer and explanation
Correct answer: a Mn
Mn (3d⁵4s²) has a partly filled d orbital.
Why the other options are wrong
- b K: K is in group 1, not d-block. The answer is Mn.
- c Ca: Ca is in group 2, not d-block. The answer is Mn.
- d Al: Al is in group 13, not d-block. The answer is Mn.
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