Eng yengil gaz qaysi, Vodorod, Kislorod, Argon, Xlor, Vodorodning belgisi qanday., H, O, C, Na, Vodorod yonadimi., Yo'q, Ha, Suv tarkibida nechta vodorod bor., 1, 2, 3, 4, Vodorodni agregat holati qanday., qattiq, suyuq, gaz, plazma.

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