Class -11

Some Basic Concepts Of Chemistry Importance and scope of Chemistry Laws of chemical combination Dalton’s atomic theory Atoms and molecules Atomic and molecular masses Mole concept Molar mass Percentage composition Empirical and molecular formula Chemical reactions Stoichiometry Calculations based on stoichiometry 2. Structure Of Atom Discovery of Electron Proton and Neutron Atomic number Isotopes and isobars Thomson’s model and its limitations Rutherford’s model and its limitations Bohr’s model and its limitations de Broglie’s relationship Heisenberg uncertainty principle Concept of orbitals Quantum numbers Shapes of s, p and d orbitals Rules for filling electrons in orbitals Aufbau principle Pauli’s exclusion principle Hund’s rule Electronic configuration of atoms Stability of half-filled and completely filled orbitals 3. Classification of Elements and Periodicity Significance and 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 Electrons gain enthalpy Electronegativity Valency Nomenclature of elements with atomic number greater than 100 4. Chemical Bonding And Molecular Structure Valence electrons Ionic bond Covalent bond Bond parameters Lewis structure Polar character of covalent bond Covalent character of ionic bond Valence bond theory Resonance Geometry of covalent molecules VSEPR theory Concept of hybridization S, p and d orbitals and shapes of some simple molecules Molecular orbital theory