An element belonging to the same group have Same number of valence electrons.
Let the group 1
Alkali metal :- Na, K, Rb, Cs, Fr all have 1 valence electron.
Elements in the periodic table are organized in the sort of way that the factors having equal chemical houses lies inside the identical vertical columns referred to as as businesses. The reason for same chemical homes is the presence of equal number of valence electrons in the valence shell.
It is determined that during both cases the valence shells (i.e. 3rd in Na and 4th in k) carry an identical number of valence electrons. consequently, it's far concluded in important institution elements have their own family percentage of an identical wide variety of valence electrons.
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