What is the basic theme of organization in the periodic table?

What is a basic buffer?

Justify the position of hydrogen in the periodic table

What is the basis of classification of elements in the periodic table?

Discuss the position of hydrogen in the periodic table.

What is the basicity of H_3PO_3 ?

What is the basicity of H_3PO_4 ?

Where is the position of d block elements in the periodic table?

Eventhough the first element in the periodic table is Hydrogen, it does not have a fixed position in the periodic table. Comment on this statement. Outline the similarities of hydrogen with the first group element as well as the Halogen family.

What is meant by groups and periods in the periodic table?

How many periods in the modern periodic table?