Which term describes a group of elements with similar chemical properties?

Which term describes a group of elements with similar chemical properties?

• A. Group
• B. Period
• C. Family
• D. Class

Answer: (C)

Elements that behave similarly are grouped into a family because they share the same number of valence electrons, which determines how they bond and react. In the periodic table, these elements line up in vertical columns, and that grouping is called a family. This shared electron arrangement explains why members of the same family have similar chemical properties—think of alkali metals all having one valence electron and showing high reactivity, or the halogens having seven valence electrons and forming similar compounds. The other terms don’t fit as well here: a period is a horizontal row, and class isn’t the standard label for this idea. Group is a common term, but the word that best emphasizes the similarity among the elements in the set is family.

Elements that behave similarly are grouped into a family because they share the same number of valence electrons, which determines how they bond and react. In the periodic table, these elements line up in vertical columns, and that grouping is called a family. This shared electron arrangement explains why members of the same family have similar chemical properties—think of alkali metals all having one valence electron and showing high reactivity, or the halogens having seven valence electrons and forming similar compounds. The other terms don’t fit as well here: a period is a horizontal row, and class isn’t the standard label for this idea. Group is a common term, but the word that best emphasizes the similarity among the elements in the set is family.