August 2022 1 25 Report
Укажи загальні формули, відповідного вищого оксиду і сполуки з Гідрогеном елемента № 17:


RO
R2O
R2O7
R2O5



RH2
RO3
R2O5
RH (в каждой колонке один правильный ответ)
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