Which statement describes the relationship of elements in the same group on the periodic table?

• A. The same or similar properties.
• B. Different properties than each other.
• C. Identical chemical symbols.
• D. They are always, always nonmetals.

Answer: (A)

Elements in the same group share the same number of valence electrons, which largely determine how atoms bond and react. Because these outer electrons drive chemical behavior, elements in a column tend to have similar properties, such as how they react with other substances and the kinds of ions they form. This makes the statement that they have the same or similar properties the best description of their relationship. They don’t have identical chemical symbols—each element has its own symbol—and groups can include metals as well as nonmetals, so they aren’t always nonmetals. While there are small differences, the overall pattern is that elements in a group behave similarly.