Strategies for solving questions related to periodic trends and atomic properties in the chemistry section of the JEE Main exam:

1. Understand the periodic table:
- Familiarize yourself with the periodic table and understand the organization of elements based on their atomic numbers.
- Pay attention to the arrangement of periods and groups, as well as the properties of elements in each block (s, p, d, and f).
- Learn the periodic trends such as atomic radius, ionization energy, electron affinity, electronegativity, and metallic character.

2. Study the periodic trends:
- Understand the periodic trends and how they change across periods and groups in the periodic table.
- Memorize the general trends for atomic radius (decreases across a period, increases down a group), ionization energy (increases across a period, decreases down a group), electron affinity (tends to increase across a period, decreases down a group), electronegativity (increases across a period, decreases down a group), and metallic character (decreases across a period, increases down a group).

3. Practice problem-solving:
- Solve a variety of practice questions related to periodic trends and atomic properties.
- Start with basic questions and gradually move on to more complex ones.
- Analyze the solution to each problem and understand the underlying concepts.
- Try to identify patterns and relationships between different properties and elements.

4. Use mnemonics and memory techniques:
- Mnemonics can help you remember the periodic trends and other key concepts.
- Create mnemonics or acronyms to remember the trends, such as "A RED CAT" for remembering the order of increasing atomic radius (Ac, Rb, Eu, Dy, Ce, As, Te).
- Use memory techniques like visualization or creating stories to remember specific examples or exceptions to the trends.

5. Review important concepts:
- Review important concepts related to atomic structure, electron configuration, ionization energy, electron affinity, and other related topics.
- Understand the factors influencing the periodic trends, such as nuclear charge, shielding effect, and effective nuclear charge.
- Familiarize yourself with the exceptions to the periodic trends, such as irregularities in the electron configuration and ionization energy of transition metals.

6. Stay updated with recent exam trends:
- Stay updated with the recent exam trends and analyze previous years' question papers to understand the types of questions asked.
- Identify the common patterns and topics that are frequently tested in the JEE Main chemistry section.
- Focus on the areas that have high weightage in the exam and allocate your study time accordingly.

Conclusion:
By understanding the periodic table, studying the periodic trends, practicing problem-solving, using memory techniques, reviewing important concepts, and staying updated with recent exam trends, you can effectively solve questions related to periodic trends and atomic properties in the chemistry section of the JEE Main exam. Regular practice and a thorough understanding of the underlying concepts are key to success in this area.