Предмет: Химия, автор: maksimroslakov6

Определите валентность элементов в химических формулах: PH3, К3N, HF, CrO, Cr2O3, Р2O5, Р2O3 , SiО2, Ca3N2. ​

dari969627: готово

Ответы

Автор ответа: dari969627
1

Объяснение : У Кислорода(O) и у водорода(H) всегда постоянная валентность это H-I и O- II.

Ответ : PH3 P(III) H(I)

K3N K(I) N(III)

HF H(I) F(I)

CrO Cr(II) O(II)

CrO Cr(III) O(II)

P2O5 P(V) O(II)

P2O3 P(III) O(II)

SiO2 Si(IV) O(II)

Ca3N2 Ca(II) N(III)

maksimroslakov6: спасибо
dari969627: рад был помочь
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