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Metal and non-metal oxides

Many and react with oxygen in the air when they are heated to produce metal oxides and non-metal oxides.

The table shows three of these reactions in detail.

ElementTypeReaction typeOxideNature
MagnesiumMetalHighly exothermic - magnesium burns with bright white flameMagnesium oxide, MgO - solid white powderBasic
CarbonNon-metalExothermic - carbon glows orange when heated stronglyCarbon dioxide, CO2 - colourless gas with no odour Acidic
SulfurNon-metalBurns slowly with a blue flameSulfur dioxide, SO2 - colourless gas with choking smell Acidic
IronMetalBurns with orange sparksTriiron tetroxide, Fe3O4 – a black, solid powderBasic
CopperMetalGlows red, occasionally with blue-green flameCopper oxide, CuO – a black, solid powderBasic
ElementMagnesium
TypeMetal
Reaction typeHighly exothermic - magnesium burns with bright white flame
OxideMagnesium oxide, MgO - solid white powder
NatureBasic
ElementCarbon
TypeNon-metal
Reaction typeExothermic - carbon glows orange when heated strongly
OxideCarbon dioxide, CO2 - colourless gas with no odour
NatureAcidic
ElementSulfur
TypeNon-metal
Reaction typeBurns slowly with a blue flame
OxideSulfur dioxide, SO2 - colourless gas with choking smell
NatureAcidic
ElementIron
TypeMetal
Reaction typeBurns with orange sparks
OxideTriiron tetroxide, Fe3O4 – a black, solid powder
NatureBasic
ElementCopper
TypeMetal
Reaction typeGlows red, occasionally with blue-green flame
OxideCopper oxide, CuO – a black, solid powder
NatureBasic
  • basic oxides react with .
  • acidic oxides react with .