MCQ practice · SSC Chemistry Board questions · Chapter 4: Periodic Table
Which is a transition element?
Think it through first, then pick an option.
- a Fe
- b Zn
- c Sc
- d K
Answer and explanation
Correct answer: a Fe
Fe (3d⁶4s²) has a partly filled d orbital, so it is a transition element.
Why the other options are wrong
- b Zn: Every d orbital of Zn (3d¹⁰4s²) is full, so it is not a transition element. The answer is Fe.
- c Sc: Sc (3d¹4s²) has a partly filled d orbital, so by the book's definition Sc is a transition element too. The board key is Fe, so the answer is Fe.
- d K: K is a group 1 alkali metal, not d-block. The answer is Fe.
More board questions on this topic
- Which is a transition element?
- Which is an alkaline earth metal?
- Which of these is a coin metal?
- Which is an alkaline earth metal?
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