Question

标出下列物质中各元素的化合价.SiO2,MgO,SO3,CO2,K2O,AgCI,Cu,H2,NaOH,O2

Answer 1

SiO2 Si+4 O -2

,Mg +2 O -2

,S +6 O -2

C +4 O -2,

K+1 O-2

,Ag +1 CI -1,

Cu 0,

H2,0

Na +1 OH -1,

O2 0