The book by A.M. Radetskii is not a story or a novel, but a collection of educational resources used in Russian schools to supplement chemistry textbooks.

: It introduces the laws governing chemical reactions and the theory of electrolytic dissociation—explaining how substances behave in solutions.

: The material starts by revisiting Grade 8 concepts like atomic structure and the Periodic Law to ensure a strong foundation.

: The bulk of the 9th-grade material focuses on detailed studies of specific groups:

The manual is designed for . It includes: Test papers and verification tasks for each topic.

The "story" of the 9th-grade portion of the book is essentially the progression of modern inorganic chemistry:

: Analyzing the characteristics of different metal groups and their industrial significance. Purpose of the Manual and GDZ