Elements in the same group of the periodic table share which feature?

Answer and explanation

Correct answer: A. The same number of valence electrons

  1. Step 1: Groups are the vertical columns. Step 2. Elements in a column have the same number of outer electrons, so similar chemistry. Answer: The same number of valence electrons. Why not the others: Protons and masses differ between elements, and the number of shells grows down a group.

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