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Classification of Elements and Periodicity in Properties
What is the basic difference between the terms electron gain enthalpy and electronegativity?
Both electron gain enthalpy and electronegativity are measures of the tendency of the atom of an element to attract electrons. Whereas electron gain enthalpy refers to the tendency of an isolated gaseous atom to accept an electron to form a negative ion, electronegativity refers to the tendency of the atom to attract the shared pair of electron towards itself in a molecule.
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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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