Question

write newlands law of octave and modern periodic law for classification of elements

Answer 1

According to Newlands' law of octaves when the elements are arranged in order of increasing atomic weights then every eighth element has properties similar to that of the first element.Newlands arranged the then known elements  modern perodic law= the statement that the chemical and physical properties of the elements recur periodically when the elements are arranged in the order of their atomic weights.