The elements in the periodic table has varying reactivity in the families. Thus, option A is correct.
The periodic table has been defined as the arrangement of the elements in the increasing order of their atomic number. The periodic table has grouped the elements based on the presence of valence electrons.
The family has been the representation of the group in the periodic table. The elements are grouped in the table based on the number of valence electrons.
The valence electrons are responsible for the chemical reactivity of the elements. The elements belonging to the same family has been representing the same number of valence electrons.
Thus, the elements in the periodic table has varying reactivity in the families. Thus, option A is correct.
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