Heterogeneous - Not uniformly mixed and can have more than one phase e.g.They are often harder than the metals they contain e.g.This makes them more useful than pure metals.Alloys have different properties to the metals which they contain. Alloys: Mixture of two or more elements with at least one of them being a metal.solutions, alloys, unsaturated salt water. Homogeneous - Components are uniformly mixed and have one phase e.g.Mixtures are composed of non-chemically bonded substances and can either be:.Lattice/Network - A 3D network of atoms chemically bonded in a lattice that are not discrete molecules.Covalent compounds - A group of 2 or more non-metal atoms bonded by sharing electrons to form discrete molecules.They don’t exist as discrete molecules but in a ratio of atoms.Ionic compounds (salts) - A metallic element bonded to one or more non-metallic elements forming a crystal lattice through a complete transfer of electrons. Compounds are pure substances made up of 2 or more different types of atoms and can be decomposed by heat, electrolysis, and high energy EM radiation.
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