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JAMB Chemistry 2007 Question 32

Question 32

Periodic Table

The elements that belong to the third period of the periodic table are

  1. A.Li, Be, Al and P
  2. B.Na, P, O and Cl
  3. C.B, C, N and O
  4. D.Na, Mg, S and Ar
Show the answer and explanation

Answer: D (Na, Mg, S and Ar)

Explanation

Period 3 runs from Na to Ar (Na, Mg, Al, Si, P, S, Cl, Ar). Li, Be, B, C, N and O are in period 2.