I. A polyatomic ion C_Two^2-, or even any salt of such. There is a triple covalent bond between the two carbon atoms.

Two. A monatomic ion C^4-, or even any salt of such. This ion is an inconceivably heavy base, & might combine by having quaternity protons to form methane: C^Four- + Quadruplet H⁺ → CH_Four.

Tercet. The carbon-containing alloy or even even doping of the metal or semiconductor, like steel. Examples

sodium carbide (Na₂One hundred_Ii) silicon carbide (SiC) Tungsten carbide (often known as just carbide)

View :Category:Carbides for a large names.

Types of carbides

Methides

The salt corresponding to the ion Hundred^Four- may be known as the methide. Methides usually react by owning a stream to form methane.

Acetylides

The salt corresponding to the ion 100_Two^Two- may be known as an acetylide. Acetylides usually react by using a river to form acetylene.

Compounds that do not fit usual notions of valence or stoichiometry

Interstitial carbides

Which are actually formed by having metals; it typically own metal properties.

Some covalent compounds

Elements that use similar electronegavitity form mainly covalent compounds. For instance, a compound si carbide is mostly covalent; it has similar structure to diamond.

Properties

Under conditions of standard temperature and pressure, metal carbides react strongly with water to form metal oxides or hydroxides and inflammable acetylene gas, e.g:

CaC_Ii + 2H₂O → 100_TwoH_Deuce + Ca(OH)₂

Carbide lamps, an important source of personal subterranean illumination for mining and caving, and it used to be that for lighthouse lamps, work through in-require production & combustion of acetylene by the metered addition of water to calcium carbide.

Gas lighting, using alkyne flatulence generated from either carbide, was utilized within occasionally homes prior to a incandescent lamp came into widespread utilise. It was as well a independent source of lighting in bicycles & carriages prior to a far flung accessibility of electric lamps and batteries. A carbide was prepared industrially per action of an electric arc furnace on a mixture of coke and limestone.