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  2. Covalent bond - Wikipedia

    en.wikipedia.org/wiki/Covalent_bond

    A covalent bond forming H 2 (right) where two hydrogen atoms share the two electrons. A covalent bond is a chemical bond that involves the sharing of electrons to form electron pairs between atoms.

  3. Coordinate covalent bond - Wikipedia

    en.wikipedia.org/wiki/Coordinate_covalent_bond

    In coordination chemistry, a coordinate covalent bond, [1] also known as a dative bond, [2] dipolar bond, [1] or coordinate bond [3] is a kind of two-center, two-electron covalent bond in which the two electrons derive from the same atom.

  4. Network covalent bonding - Wikipedia

    en.wikipedia.org/wiki/Network_covalent_bonding

    A network solid or covalent network solid (also called atomic crystalline solids or giant covalent structures) [1] [2] is a chemical compound (or element) in which the atoms are bonded by covalent bonds in a continuous network extending throughout the material.

  5. Wikipedia - Wikipedia

    en.wikipedia.org/wiki/Wikipedia

    Wikipedia [c] is a free-content online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the wiki ...

  6. Three-center two-electron bond - Wikipedia

    en.wikipedia.org/wiki/Three-center_two-electron_bond

    This bonding pattern is also seen in trimethylaluminium, which forms a dimer Al 2 (CH 3) 6 with the carbon atoms of two of the methyl groups in bridging positions. This type of bond also occurs in carbon compounds, where it is sometimes referred to as hyperconjugation- another name for asymmetrical three-center two-electron bonds.

  7. Metallic bonding - Wikipedia

    en.wikipedia.org/wiki/Metallic_bonding

    Metallic bonding is a type of chemical bonding that arises from the electrostatic attractive force between conduction electrons (in the form of an electron cloud of delocalized electrons) and positively charged metal ions.

  8. Linking number - Wikipedia

    en.wikipedia.org/wiki/Linking_number

    The two curves of this (2, 8)-torus link have linking number four.In mathematics, the linking number is a numerical invariant that describes the linking of two closed curves in three-dimensional space.

  9. Aluminium hydride - Wikipedia

    en.wikipedia.org/wiki/Aluminium_hydride

    Aluminium hydride (also known as alane and alumane) refers to a collection of inorganic compounds with the formula Al H 3.As a gas, alane is a planar molecule. When generated in ether solutions, it exists as an ether adduct.