Предмет: Химия, автор: OriekhovaLenka

cколько протонов Z и нейтронов N в ядре изотопа 40K

Ответы

Автор ответа: naugros

протоны равны номеру элемента- соответственно-19, нейтроны равны от массы отнять номер-=40-19=21

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