Multiple choice

Four elements along a period have atomic numbers 11, 13, 16 and 17. The most metallic among these has an atomic number of

  1. 11

  2. 12

  3. 16

  4. 17

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A Correct answer
Explanation

As we move along a period, the metallic character decreases.  The most metallic among these has an atomic number of 11, which is Na present on the extreme left in the periodic table.