Предмет: Химия, автор: MatikRafik

Выбери верные утверждения:
1) в третьем периоде содержится два элемента
2) группы В периодической таблицы содержат элементы малых и больших периодов
3) три периода периодической таблицы называются малыми
4) в группе объединены элементы со сходными свойствами
СРОЧНО ПОЖАЛУЙСТА

Ответы

Автор ответа: nargizhasimova2003

Объяснение:

3)три периода периодической системы называются мвлыми.

4)в группе объединены элементы со сходными свойствами.

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