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a solid network of atoms making up a large crystal with covalent bonds between the atoms.
a group of organic compounds in which a halogen has replaced a hydrogen atom.
a proton that forms a coÂordinate covalent bond with a water molecule H3O+
types of chemical âunitsâ â could be atoms, molecules, molecular fragments, simple or...
forms ions (either by breaking a crystal lattice up or by a chemical reaction).