SSC MTS EXAM

Detailed explanation-1: -The elements of same group have similar chemical properties because they have same number of valence electrons. For eg: Li has 1 valence electron and so does NA, K and Cs.

Detailed explanation-2: -Reason: Elements in a group have the same number of electrons in the outermost shell hence they have similar chemical properties.

Detailed explanation-3: -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-4: -For example, pairs lithium (Li) and magnesium (Mg), beryllium (Be) and aluminium (Al), boron (B) and silicon (Si), etc are exhibiting similar properties. Boron and Silicon are both semiconductors. Thus Magnesium and Lithium have similar properties.