How many periods and groups are there in the modern periodic table ?

How many groups are there in the modern periodic table?

What is the difference between the molecules of soaps and detergents, chemically ? Explain the cleansing action of soaps. or How many groups and periods are there in the modern periodic table ? How do the atomic size and metallic character of elements vary as we move : 1. along the group 2. along the period :

How many groups and periods are present in the modern periodic table ?

How many groups are present in the long form of the periodic table?

How many groups and how many periods are there in long form of periodic table?

What are bridge and typical elements in the modern periodic table ?

How many transition series of elements are there in the periodic table.

The largest group in Modern periodic table is

How many periods and groups were present in Mendeleev's original periodic table?

The member of periods and group in the long form of periodic table are