: Protons, neutrons, electrons, and electron shell configurations.
While original physical copies are common in school libraries, you can often find digital versions or "GDZ" (ready-made homework) guides on educational platforms like Lit.khv.ru or similar Russian pedagogical sites. gavrusenko proverochnye raboty po khimii 8 klass
: Covalent (polar/non-polar), ionic, and metallic bonds. and metallic bonds.