Unit 5 States of Matter


state and use the general gas equation pV=nRT in calculations, including the determination of Mr;describe, using a kinetic-molecular model, the liquid state, melting, vaporisation and vapour pressure;describe in simple terms the lattice structure of a crystalline solid which is     -ionic, as in NaCl, MgO     -simple molecular, as in I2       -giant molecular, as in graphite, diamond,      silicon(Ⅳ) oxide     - hydrogen bonded, as in ice     - metallic, as in Cu