Q29 of 181 Page 283

State modern periodic law.

Modern Periodic law which was given by Bohr stated that the physical and chemical properties of elements are the periodic function of their atomic number.


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28

Besides gallium, which two other elements have since been discovered for which Mendeleev had left gaps in his periodic table.

 28

Which group of elements was missing from Mendeleev’s original periodic table ?

 29

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

 29

How could the modern periodic law remove various anomalies of Mendeleev’s periodic table? Explain with examples.