The following are some important subtopics for Chemistry of Main Group Elements - Structure and Bonding Concepts while preparing for the Joint Entrance Examination (JEE):

1. Electron Configurations of Main Group Elements: Trends, Noble gas configurations, Aufbau principle, Periodic trends.

NCERT References:

• 11th Chemistry, Chapter 3 - Classification of Elements and Periodicity
• 12th Chemistry, Chapter 6 - p - Block Elements: Group 15
• 12th Chemistry, Chapter 7 - p - Block Elements: Group 16
• 12th Chemistry, Chapter 8 - d - and f - Block Elements

2. Periodic Properties: Ionisation energy, electron affinity, atomic radii, covalent radii, electronegativity, and their periodic trends.

NCERT References:

• 11th Chemistry, Chapter 3 - Classification of Elements and Periodicity
• 12th Chemistry, Chapter 6 - p - Block Elements: Group 15
• 12th Chemistry, Chapter 7 - p - Block Elements: Group 16
• 12th Chemistry, Chapter 8 - d - and f - Block Elements

3. Chemical Bonding in Main Group Compounds: Octet rule, Lewis structures, ionic bonds, covalent bonds, polar and nonpolar bonds, multiple bonds, sigma, and pi bonds.

NCERT References:

• 11th Chemistry, Chapter 4 - Chemical Bonding and Molecular Structure
• 12th Chemistry, Chapter 6 - p - Block Elements: Group 15
• 12th Chemistry, Chapter 7 - p - Block Elements: Group 16
• 12th Chemistry, Chapter 8 - d - and f - Block Elements

4. Lattice Structures: Crystal lattices, ionic lattice, covalent lattice, metallic lattice, crystal defects.

NCERT References:

• 11th Chemistry, Chapter 1 - Some Basic Concepts of Chemistry
• 11th Chemistry, Chapter 5 - States of Matter: Gases and Liquids
• 11th Chemistry, Chapter 6 - Thermodynamics

5. Properties of ionic compounds: High melting and boiling points, solubility, hardness, brittle, and electrical conductivity in both liquid and solid-state.

NCERT References:

• 12th Chemistry, Chapter 6 - p - Block Elements: Group 15
• 12th Chemistry, Chapter 7 - p - Block Elements: Group 16
• 12th Chemistry, Chapter 8 - d - and f - Block Elements

6. Properties of covalent compounds: Low melting and boiling points, solubility, softness, non-conductivity of electricity, and formation of molecular structures.

NCERT References:

• 12th Chemistry, Chapter 6 - p - Block Elements: Group 15
• 12th Chemistry, Chapter 7 - p - Block Elements: Group 16
• 12th Chemistry, Chapter 8 - d - and f - Block Elements

7. Coordination Complexes: Complexation, ligands, coordination number, geometry of complexes, crystal field theory, and applications of coordination complexes, such as in catalysis and medicinal chemistry.

NCERT References:

• 11th Chemistry, Chapter 4 - Chemical Bonding and Molecular Structure
• 12th Chemistry, Chapter 9 - Coordination Compounds
• 12th Chemistry, Chapter 10 - Haloalkanes and Haloarenes

8. Main Group Element Chemistry in Everyday Life: Applications of main group elements in various fields, such as pharmaceuticals, agriculture, materials science, and industrial processes.

NCERT References:

• 11th Chemistry, Chapter 1 - Some Basic Concepts of Chemistry
• 11th Chemistry, Chapter 2 - Structure of Atom
• 11th Chemistry, Chapter 3 - Classification of Elements and Periodicity
• 11th Chemistry, Chapter 4 - Chemical Bonding: and Molecular Structure
• 11th Chemistry, Chapter 5 - States of Matter: Gases and Liquids
• 11th Chemistry, Chapter 6 - Thermodynamics
• 12th Chemistry, Chapter 6 - p - Block Elements: Group 15
• 12th Chemistry, Chapter 7 - p - Block Elements: Group 16
• 12th Chemistry, Chapter 8 - d - and f - Block Elements
• 12th Chemistry, Chapter 9 - Coordination Compounds