Предмет: Химия, автор: hodos45anton

Електронна формула деякого елемента -1s²2s², за кількістю електронів визначте порядковий номер елемента і вкажіть його назву:

Ответы

Автор ответа: romancovakira70

0

Ответ:

г( порядковий номер 5, Бор , 5 електронів

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