Which contains elements with similar properties in the periodic table? A. a period B. a column C. a row

That would be a column (called a group)

Answer: Option (B) is the correct answer.

Explanation:

Elements of a group represent similar chemical properties because they contain same number of valence electrons which determines their reactivity.

Hence, elements of a group have same chemical nature or property.

A group is represented by a vertical column in a periodic table.

On the other hand, a period is represented by a horizontal line.

Thus, we can conclude that a column contains elements with similar properties in the periodic table.