state mendeleev's and modern periodic law.
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ACC. TO MENDELEEV'S PERIODIC LAW.
" THE PHYSICAL AND CHEMICAL PROPERTY OF THE ELEMENTS ARE THE PERIODIC FUNCTION OF THEIR ATOMIC MASSES."
WHILE
ACC. TO MODERN'S PERIODIC LAW :-
THE PHYSICAL AND CHEMICAL PROPERTY OF THE ELEMENTS ARE THE PERIODIC FUNCTION OF THEIR ATOMIC NUMBER.
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Answer:
Mendeleev periodic law
when elements are arranged in increasing order of their atomic masses, Mendeleev found that the elements with similar physical and chemical properties repeat after a definite interval. On these basis Mendeleev State periodic law.
Modern periodic table
The chemical and physical properties of elements are a periodic function of their atomic numbers.