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JAMB Chemistry 1999 Question 15

Question 15

Atomic Structure

1s22s22p63s23p63d74s2. An element with the electron configuration above is a

  1. A.non-metal
  2. B.metal
  3. C.transition element
  4. D.group two element
Show the answer and explanation

Answer: C (transition element)

Explanation

The element is filling its 3d sub-level (it is cobalt), which makes it a transition element.