Pniktogenlar oilasiga qaysi elementlar kiradi , 5 guruh elementlari azot, fosfor, mishyak, surma, vismut, Kislorodoltingugurt, selen, tellur, Geliy, neon, argon, kripton, ksenon, Litiy, kaliy, natriy , Kuldiruvchi gaz deb ataluvchi azot oksidi formulasi to'g'ri ko'rsatilgan qatorni toping , NO2, N2O, N2O5 , NO, Azot 5 oksid tarkibidagi azotning valentligi va oksidlanish darajasini toping, Valentligi 5,oksidlanish darajasi +5, Valentligi 4, oksidlanish darajasi +4, valentligi 4,oksidlanish darajasi +5, valentligi 3,oksidlanish darajasi - 3, vodorod sulfid formulasini ko'rsating , SO2, H2S, H2SO4, H2SO3, Galogenlar oilasiga qaysi elementlar kiradi , ftor, xlor, brom, yod, Heliy, neon, kripton, ksenon, , Litiy, kaliy, natriy, , azot fosfor, surma mishyak, Ammiakning formulasini toping, N2H4, NH3, NH4NO3, NH4Cl, ammoniy gidroksidi tibbiyotda qanday nomlanadi, Surgi dori, Etil spirti, Novshadil spirti, Laboratoriyada ammiak olish usuli to'g'ri berilgan qatorni toping , N2+3H2=2NH3, NH4Cl+NaOH=NH3+, CuO+2NH3=3Cu+3H2O+N2, N2+O2=2NO2.
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