State modern periodic law. What is number of group and periods in the modern periodic table?

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Solution

Modern periodic law states that the physical and chemical properties of elements are the periodic functions of their atomic number.

There are 18 groups and 7 periods present in the modern periodic table.

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Similar questions

(a) State modern periodic law.

(b) How does the electronic configuration of the atom of an element relate to its position in the modern periodic table?

(d) Is it possible to have an element having atomic number 1.5 placed between hydrogen and helium?

(e) Name the scientist who prepared the modern periodic table.

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