What contains elements with similar properties in the periodic table?
a) a column
b) a row
c) a period

A) A column contains elements with properties which are similar in periodic table.

The vertical section (column) in the periodic table has the similar type of chemical behavior so they are also called as groups or families. The electronic configuration gives the chemical description of the compound.

The chemical compounds in these families have the number of valence electron which is same in the outer cell hence, showing the same chemical properties. Halogens and Nobel gases are the groups of periodic table.