SSC MTS EXAM

Detailed explanation-1: -The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.

Detailed explanation-2: -The three major groups on the Periodic Table are the metals, nonmetals and metalloids. Elements within each group have similar physical and chemical properties. Some of the physical properties used to distinguish between the three groups are: Luster = the ability of a substance to reflect light.