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: -Elements in the same column of the Periodic Table have similar chemical properties. So what does that mean about their valence electrons? You guessed it! Elements in the same column of the Periodic Table have the same number of valence electrons – that’s why they have similar chemical properties.

Detailed explanation-3: -The elements in the same group have a similar number of valence electron. They have an identical number of electrons in their outermost shell. e.g. All the alkali metals in Group 1 have 1 valence electron, so they all tend to react the same way with other substances.

Detailed explanation-4: -The vertical columns (groups) of the periodic table are arranged such that all its elements have the same number of valence electrons.