Question

if elements P Q R and S have same number of Valence Electrons will they have same kind of chemical properties support your answer by one example

Answer 1

The physical and chemical properties of an element depends on it's​ Atomic number.
The elements having same Valance electrons have similar properties.This is called PERIODICITY.

For example:
Lithium and Sodium have the same number of Valance electrons and hence they have similarities in their physical and chemical properties.

Hope it helps.........

Answer 2

Yes, if the elements having same number of valence electrons then they have same kind of chemical properties. ex:sodium and potassium have same valency and they are belong to same group and they have same properties.

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