Carbon is a nonmetallic element with chemical symbol C, which is stable at room temperature, difficult to react and extremely low in toxicity to human body. It can even be safely ingested in the form of graphite or activated carbon, which is located in the second periodic group of the periodic table of elements. The common natural forms of carbon are diamond, carbon and graphite.

Chemical properties:

The commonness of (1) nonmetallic elements:

Reaction with oxygen: 2C+O2 (small amount) = ignition = =2CO. C+O2 (sufficient) = ignition = =CO2.

② Reducibility:

Reaction with carbon dioxide: C+CO2 = ignition = =2CO.

Reaction with iron oxide: 2Fe2O3+3C = high temperature = = 4Fe+3CO2 =

Reaction with ferroferric oxide: Fe3O4+2C = high temperature = 3fe+2co2 =

Reaction with copper oxide: 2CuO+C = high temperature = = 2cu+CO2 =

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