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GK QUESTION#3299

Which schematic, described by its group and period counts, matches the standard modern periodic table?

  1. ADiagram c: seven periods; group columns numbered 1–17.
  2. BDiagram d: seven periods; group columns numbered 1–18.Correct answer
  3. CDiagram a: six periods; group columns numbered 1–15.
  4. DDiagram b: six periods; group columns numbered 1–16.
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Answer

B. Diagram d: seven periods; group columns numbered 1–18.

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Explanation

The standard modern periodic table has seven periods and eighteen numbered groups. Diagram d has both counts. Diagram a shows six periods and fifteen group columns, diagram b six and sixteen, and diagram c seven and seventeen. Diagram d corresponds to option B.

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