Observe the following statements :I. The phys | vedclass

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(B) Statement $I$ is correct because the modern periodic law states that physical and chemical properties of elements are periodic functions of their

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only $I$ is correct

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(B) Statement $I$ is correct because the modern periodic law states that physical and chemical properties of elements are periodic functions of their atomic numbers,which is equivalent to their electronic configuration.Statement $II$ is incorrect because fluorine $(F)$ has the highest electronegativity $(4.0)$ among all elements,which is greater than that of chlorine ($Cl$,$3.0$).Statement $III$ is incorrect because electropositive nature (metallic character) increases from top to bottom in a group due to the increase in atomic size and decrease in ionization enthalpy.Therefore,only statement $I$ is correct.

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