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Classification of Elements and Periodicity in Properties
What is periodic table? What do you mean by classification of elements?
Periodic table is defined as the arrangement of all the known elements according to their properties in a tabular form. The method of arranging similar elements together and separating them from dissimilar elements is called classification of elements. The aim of classification is to make the study of the elements and their compounds easier.
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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?
To which block the element with outer electronic configuration 4s23d10 belongs?
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