Предмет: Химия, автор: zotof9

дайте характеристику по положению в ПСХЭ Д.И.Менделеева следующим атомам :алюминию ,хрому , мышьяку
Опишите электронную конфигурацию атомам
Выручайте..

Ответы

Автор ответа: ZillyMonk

Al - 3 период, 3 группа, главная подгруппа. 1s2 2s2 2s6 3s2 3s1
Cr - 4 период, 6 группа, побочная подгруппа 1s2 2s2 2s6 3s2 3s6 3s10 4s1
As - 4 период, 5 группа, главная подгруппа 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p3

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