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JAMB Chemistry 1992 Question 12

Question 12

Atomic Structure

Four elements P, Q, R and S have 1, 2, 3 and 7 electrons in their outermost shells respectively. The element which is unlikely to be a metal is

  1. A.P
  2. B.Q
  3. C.R
  4. D.S
Show the answer and explanation

Answer: D (S)

Explanation

Metals usually have 1–3 outer electrons, which they lose. An element with 7 outer electrons gains one electron and is a non-metal (a halogen).