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Classification of Elements and Periodicity in Properties
Which element do you think would have been named by:
(i) Lawrence Berkeley Laboratory
(ii) Seaborg's group?
i) Lawrencium (Lr) with Z = 103 is an actinide which involves the filling of 5f orbital andBerkelium (Bk) with Z = 97 is an actinide which involves the filling of 5f orbital (both of them are f block elements).
ii) Seaborgium (Sg) with Z = 106 is a d- block element present in 7th period & 6th column of periodic table.
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Give the ‘liquid elements’ in the periodic table.
What is valency of an element?
Gallium was named by Mendeleev as
What are magic numbers?
Which property is the basis of long form of periodic table?
How many elements are placed in each period of the p-block?
What is the number of groups in: (i) p-block (ii) d-block?
How many elements are present in:
(i) second period
(ii) fourth period
(iii) sixth period?
What is the name given to the s-block elements?
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