Определите химические элементы по электронным схемам атомов:
1)2ё,8ё,5ё
2)2ё,8ё,1ё
3)2ё,2ё
4)2ё,8ё,7ё
5)2ё,8ё,8ё,2ё
6)2ё,8ё,18ё,4ё
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