Give the ‘liquid elements’ in the periodic table.
How many elements are present in:(i) second period (ii) fourth period (iii) sixth period?
What is valency of an element?
What are magic numbers?
Gallium was named by Mendeleev as
What is the number of groups in: (i) p-block (ii) d-block?
How many elements are placed in each period of the p-block?
Which property is the basis of long form of periodic table?
