Atomic radius- Covalent, ionic and van der Waal radii -Explanation with examples - Definition, methods of determination or evaluation of atomic and ionic radii, ionization energy, electron affinity and electronegativity – Trends in periodic table and applications in predicting and explaining the chemical behavior - Factors influencing ionization energy in a group and a period - Variation of Electronegativity in a group and a period - Relationship between electronegativity, ionization Energy and electron affinity - Pauling Scale of Electronegativity.

Ionic Solids: Ionic structures -Radius ratio effect and coordination number -Limitation of radius ratio rule Metallic bond: Free electron, valence bond and band theories. Weak Interactions: Hydrogen bonding, van der Waals forces. Covalent Bond – Valence bond theory and its limitations - Directional characteristics of covalent bond, Various types of hybridization and shapes of simple inorganic molecules and ions - Valence shell electron pair repulsion (VSEPR) theory to NH3, H3O+, SF4, CIF3, ICl2, and H2O

Characteristic Properties of d-block Elements. Properties of the elements of the first transition series, their binary compounds and complexes illustrating relative stability of their oxidation states, coordination number and geometry. Chemistry of Elements of Second and Third Transition Series General characteristics - Comparative treatment with their 3d-analogues in respect of ionic radii, oxidation states, magnetic behaviour, spectral properties and stereochemistry - Position of lanthanaides and actinides in the periodic table - Lanthanide contraction -Spectral and magnetic properties of lanthanides -Separation of lanthanides and actinides.

Molecular Orbital theory: Basic ideas – Criteria for forming M.O. from A.O., construction of M.O’s by LCAO – H ion - Calculation of energy levels from wave functions -Physical picture of bonding and antibonding wave functions -Concept of σ, σ*, π, π* orbitals and their characteristics - Hybrid orbitals -sp, sp2, sp3 Valence Band Model:Valence bond model of H2 -Comparison of M.O. and V.B. Models. Discussion about homonuclear (He2, N2, O2, F2, C2 ) and heteronuclear (CO and NO) diatomic molecules - Bond Order and bond energy -Percentage ionic character from dipole moment and electronegativity difference.

Principles and applications of column chromatography, paper chromatography and thin layer chromatography