1.определите степень окисления элементов в веществах:
PBr5 , CIF3, Mg2Si, AIN, NA2SO4, Cr(NO3)3, Ni(No2)2
PBr5 , CIF3, Mg2Si, AIN, NA2SO4, Cr(NO3)3, Ni(No2)2
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5 -1PBr5
+3-1
CIF3
+2-4
Mg2Si
+3-3
AIN
+1 +6-2
Nа2SO4
+3 +5 -2
Cr(NO3)3
+2+3-2
Ni(No2)2
Ni(+2)(NO2)2 (-),