COMEDK · Chemistry · 23. d and f Block Elements
An element with atomic number 21 is a
- A halogen
- B representative element
- C transition element
- D alkali metal
Answer & Solution
Correct Answer
(C) transition element
Step-by-step Solution
Detailed explanation
Electronic configuration of element (21) is \(1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{1}\) \(\therefore\) It is a transition element as its last electron enters in \(d\)-orbital.
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