metallar qanday oksidlanish darajasiga ega, musbat, manfiy, H2O da kislorod ning oksidlanish darajasi qanday, -1, -2, oksidlanish nima , elektron olish, elektron berish, qaytaruvchi bu, elektron olish, neytrallanish, quyidagilardan qaysi biri oksidlovchi, O2, H2, Fe---->Fe² ga o'tishda temir, qaytariladi, oksidlanadi, elektronni qabul qilgan zarra cha, qaytariladi, parchalanadi, oksidlanish darajasi nima, atom radiusi, shartli zaryad, qaysi elementni oksidlanish darajasi ôzgarmaydi, Ne, K, quyidagilardan qaysi biri qaytaruvchi, H2, KMnO4.
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