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What is the modern periodic law?

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What is the modern periodic law?

Posted by Taniya 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Anil Tharkar 5 years, 3 months ago

The modern periodic law states that the properties of the elements are a periodic function of their atomic numbers. As the properties of the elements are dependent upon the atomic number we can say that these are dependent upon the electronic configuration of the elements.

Gaurav Seth 5 years, 3 months ago

Moseley gave the Modern Periodic Law which states that: Physical and chemical properties of the elements are the periodic function of their atomic numbers.

Atomic mass of an element is due to the mass of protons and neutrons present in the nucleus of its atom.

As the number of electrons in an atom are given by the atomic number and not by the mass number therefore, atomic number should form the basis of the classification of the elements in the periodic table and not atomic mass as predicted by Mendeleev.

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