Предмет: Химия, автор: zenja0701

2. Что такое период? *
Горизонтальная строка элементов
Вертикальный столбик элементов
И вертикальный столбик и горизонтальная строка

Ответы

Автор ответа: cherkinakarina30

0

Ответ:

Пери́од — строка периодической системы химических элементов, последовательность атомов по возрастанию заряда ядра и заполнению электронами внешней электронной оболочки. Периодическая система имеет семь периодов.

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