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C2.2 Glossary

Structure and Properties Glossary

Compound A substance made when two or more elements are chemically bonded together.
Covalent Bond The attraction between two atoms that share one, or more pairs of electrons.
Covalent Bonding The attraction between two atoms that share one, or more pairs of electrons.
Delocalised Electron bonding electron that is no longer associated with any one particular atom.
Dot and Cross Diagram a drawing to show the arrangement of the outermost electrons only of the atoms or ions in substance.
Double Bond a covalent bond formed by the sharing of two pairs of electrons.
Giant Covalent Structure a huge 3D network of covalently bonded atoms. (e.g. the giant lattice of carbon atoms in diamond or graphite.
Giant Lattice a huge 3D network of atoms or ions (e.g. the giant ionic lattice in sodium chloride).
Ion a charged particle produced by the loss or gain of electrons.
Ionic Bond the electrostatic force of attraction between positively and negatively charged ions.
Ionic Bonding the electrostatic force of attraction between positively and negatively charged ions.
Mixture when some elements or compounds are mixed together and intermingle but do not react together ( i.e. no new substances are made). A mixture is NOT a pure substance.
Macromolecule Giant covalent structure.
Monomers Small reactive molecules that react together in repeating sequences to form a very large molecule (a polymer).
Nanoscience The study of very tiny particles or structures between 1 and 100 nanometres in size- where 1 nanometre = 1x10-9metres
Polymer A substance made from very large molecules made of many repeating units e.g. poly(ethene).
Polymerisation The reaction of monomers to make a polymer.
Created by: ChosenHill



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