How many elements are present in:
(i) second period
(ii) fourth period
(iii) sixth period?
What is the number of groups in: (i) p-block (ii) d-block?
(i) p-block: Six groups
(ii) d-block: Ten groups.
How many elements are placed in each period of the p-block?
Which property is the basis of long form of periodic table?
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