: Typically focuses on theoretical foundations, including the periodic system and the types of chemical bonds.

Автор(ы). Ким Е.П. Заглавие. Химия: 9 класс рабочая тетрадь в 2 ч. Место издания. Саратов. Издательство. Лицей. Год издания. 2005.

: Often dives deeper into specific elements (halogens, oxygen group, nitrogen group) and organic chemistry basics. Study Tips for Success

Mastering 9th Grade Chemistry: A Closer Look at the Kim E.P. Workbook (Lyceum Publishing)