According to the Periodic Law of elements, the variation in properties of elements is related to their

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Nuclear masses

Atomic numbers

Nuclear neutron-proton number ratios

Atomic masses

answer is B.

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Detailed Solution

he physical and chemical properties of elements are periodic functions of their atomic number. This is called as periodic law of elements.
The modern periodic table is based on the periodic law of elements and the elements are arranged as the increasing order of their atomic number.

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