Arjun opens Chapter 1: Periodic Properties. Question 1.1: "Arrange the following in order of increasing ionic radius: Na+, Mg2+, Al3+, O2-, F-."
One post read: "Dear Dr. Jaiswal, you never met me. But you sat with me every night for two years. You taught me that inorganic chemistry is not memorization. It is logic, symmetry, and elegance. You taught me how to fight a problem until it surrenders. Thank you for the green book. Rest in peace, sir."
What made his book different? It was the .