Explain the construction of periods in Modern periodic table.

What is a period in modern periodic table ?

Which property of an element is basis in the construction of modern periodic table ?

Answer the following question based on the values of the atomic radii of the elements of one of the periods in modern periodic table Li ( 152 ) , Be (111) B, (88) , C (77) ,N (74) ,o (66 ) and F (64) In the numerical listing of periods in the modern periodic table , what number was given to above elements ?

No. of groups in modern periodic table................

Define the mordern periodic law . Discuss the construction of the long form of the periodic table .

Write modern periodic law .

The starting element and last element in the largest period in modern periodic table are