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Classification of Elements and Periodicity in Properties
Chemistry · Chapter 6 · Inorganic Chemistry (Unit 3: Classification of Elements and Periodicity in Properties)
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- Need for classification; Mendeleev's periodic law and table: merits and defects; modern periodic law
- Long form of the periodic table: groups and periods; s, p, d and f blocks; IUPAC numbering of groups 1-18; IUPAC names for elements with Z > 100
- Periodic trends in atomic and ionic radii and valence electrons; factors such as nuclear charge and shielding (screening)
- Ionisation enthalpy, electron gain enthalpy and electronegativity: trends in groups and periods; metallic and non-metallic character
- Periodicity of valence and oxidation states; anomalous properties of second-period elements; diagonal relationship; acidic and basic nature of oxides