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