Nechta kimyoviy element bor, 107, 118, 100, Moddalar necha toifaga bo'linadi, 2, 4, 5, 7, Ion nima, element, zaryadlangan zarra, atom, Oksid necha turga bo'linadi, 4, 6, 3, bu nima, ko'lba, probirka, menzurka

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