Предмет: Химия, автор: TheFouMinds

С возрастанием порядкового номера элемента в ПС переодически повторяются (несколько вариантов):

1. Величина зарядов атомных ядер
2. Число ē во внешнем слое
3. Число энергетических уровней
4. Число протонов в ядре
5. Форма и характер оксидов и гидроксидов химических элементов

Ответы

Автор ответа: Аноним

Ответ:

Объяснение:

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9. ................. the students ................. a test now?
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