2.2 Covalent Bond Vocab flash cards

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Allotrope

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An alternative form in which an element can exist. E.g. the allotropes of carbon include diamond, graphite and Buckminsterfullerene.

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Bonding electrons

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Shared electrons which simultaneously belong to both atoms in a bonding pair.

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Covalent Bond

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Where electrons are shared by two nuclei.

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Delocalised electrons

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Electrons which are able to move between the layers of a covalent structure.

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Dipole

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The separation of charge across a chemical bond.

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Double bond

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A chemical bond involving four electrons.

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Electron-deficient

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Molecules which are unable to form an octet due to too few valence electrons e.g. beryllium and boron.

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Fullerene

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An allotrope of carbon which acts as a superconductor. Example: Buckminsterfullerene.

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Giant covalent structure

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Large networks of atoms covalently bonded together.

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Inert

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Having achieved a state of stability of unreactivity.