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Member for
2 years 3 monthsAge: 13-18
Level: 5
Language: Russian
(ru)
ID: 1786516
11/01/2022
Country code: RU
Country: Russia
Main content: Химия (1982419)
From worksheet author:
Посмотри видео. Определи валентность химических элементов
Other contents:
Валентность
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