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CHEMISTRY

(DISCIPLINE – C)

DISCIPLINE SPECIFIC COURSES:

Chem.111 Atomic Structure & Chemical Bonding 3+1

LEARNING OBJECTIVES:

Objectives of the course are:
 To review the structure of the atom, as it is a necessary pre-requisite in understanding
the nature of chemical bonding in compounds.
 To discuss the periodicity in properties with reference to the s and p block, this is
necessary in understanding their group chemistry.
 To provide basic knowledge about different types of bonding present between atoms or
ions.

LEARNING OUTCOMES:

The students will be able to:
● Solve the conceptual questions related to quantum numbers, electronic configuration, radial and
angular distribution curves, shapes of s, p, and d orbitals, and periodicity in atomic radii, ionic
radii, ionization enthalpy and electron affinity of elements.
● Predict the geometries of molecules using radius ratio rules, VSEPR theory and MO diagrams
(homo- & hetero-nuclear diatomic molecules).
● Understand the concept of lattice energy using Born-Landé and Kapustinskii equation.
● Calibrate the apparatus used in titrimetric analysis and prepare standard solutions for titration.
● Understand the theory and application of various acid-base and redox titrations.

THEORY (45 Hours)

UNIT-I: Atomic Structure (15 Hours)
Recapitulation of concept of atom, Bohr‘s theory & its limitations, atomic spectrum of hydrogen
atom.de Broglie concept of dual nature of matter, Heisenberg‘s Uncertainty Principle, and its
significance. Postulates of wave mechanics, Time independent Schrödinger‘s wave equation, well
2
behaved wave function, significance of ψ and ψ . Quantum mechanical treatment of H- atom,
Quantum numbers and their significance. Normalized and orthogonal wave functions. Sign of
wave functions. Radial and angular wave functions for hydrogen atom. Radial function plots,
radial probability distribution plots, angular distribution curves. Shapes of s, p, and d orbitals,
Relative energies of orbitals. Pauli‘s Exclusion Principle, Hund‘s rule of maximum spin
multiplicity, Aufbau principle and its limitations.

UNIT- II: Periodic properties of Elements & Periodic Trends (6 Hours)
Brief discussion of the following properties of the elements, with reference to s- &p-block and
their trends:
a) Effective nuclear charge, shielding or screening effect and Slater‘s rules
b) Atomic and ionic radii
c) Ionization enthalpy (Successive ionization enthalpies)
d) Electron gain enthalpy

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