How many elements are present in IIIB group of the long form of the periodic table ?

How many elements are present in the 5 ^(th) period of the long form peripodic table ? Give a possible reason .

Which element is placed in two different groups of the long form of the periodic table?

Most of the non-metals are present in the long form of the periodic table in

State modern periodic law. How many groups and periods are present in the long form of the periodic table?

The number of periods present in the long form of the periodic table

Write the salient features of the long form of the periodic table.

Define Modern periodic law? Why many groups and periods are present in the long form of the periodic table?

Number of elements present in period - 2 of the long form periodic table _________