CBSE BOARD X, asked by izasrutha2mohar1ash, 1 year ago

State the modern periodic law for classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?

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Answered by saubia

Modern periodic law states as "The physical and chemical properties of elements are periodic function of their atomic number."
There are 18 groups and 7 periods in modern periodic table.

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