necha element bor, 118, 109, 112, 103, kislorodning atom massasi, 16, 18, 32, 48, kislorod valenligi, 2, 1, 0, 4, H2 massasi, 2, 1, 4, 8, suvnng massasi, 16, 18, 32, 20, bu qaysi idish, probirka, menzurka, kolba, stakan

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