Question

state the periodic law on which the modern periodic table is based

Answer 1

Answer:

physical and chemical properties of the elements are the periodic function of their atomic numbers.

Answer 2

$\sf{according \: to \: Henry \: Moseley \: properties } \\ \sf{ of \: atoms \: are \: periodic \: function \: of} \\ \sf{ their \: atomic \: number.}$

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