2.4.1 Sizes of particles and their properties Nanoparticles 1-100nm in size, a few hundred atoms thick High SA:vol ratio Smaller than fine particles (PM5) – diameters between 100-2500nm (1×10-7-2.5×10-6m) Coarse particles (PM10) – diameters between 1×10-5-2.5×10-6m –...
2.2.1 The three states of matter Properties of Solids, Liquids and Gases Solid Liquid Gas Close together in regular pattern Strong intermolecular force of attraction Vibrate at fixed position Fixed shape & volume Close together in random pattern Further apart...
2.3.1 Diamond 2.3.2 Graphite 2.3.3 Graphene and fullerenes (See 2.1.4 Covalent bonding)
2.1.1 Chemical bonds (See 2.1.2-2.1.5 below) 2.1.2 Ionic bonding Ionic bonding Transfer of electrons between metal & non-metal Electrostatic force of attraction in all directions between oppositely charged ions Occurs in ionic compound Produce giant ionic...