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Unit III: Classification of Elements and Periodicity in Properties


CBSE Class 11 Chemistry

Unit III: Classification of Elements and Periodicity in Properties 

 Significance of classification, brief history of the development of periodic table, modern periodic law and the present form of periodic table, periodic trends in properties of elements -atomic radii, ionic radii, inert gas radii, Ionization enthalpy, electron gain enthalpy, electronegativity, valency. Nomenclature of elements with atomic number greater than 100.