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Amorphous
No regular pattern
Examples of Amorphous
plastics, glass, wax, igneous rock
Crystalline
Has a regular pattern
Examples of Crystalline
Ionic, Molecular, Covalent Network, and Metallic
Ionic
Cation and anion, high melting points, soluble in water, conducts if dissolved or melted, hard, nonvolatile
Examples of Ionic
NaCl, KCl, CaF2, K2O
Molecular
1 or more nonmetals, weak IMFs, low melting/boiling points, insoluble in water (unless polar/acid) always nonconductors, most are soft, usually volatile
Examples of Molecular
CH4, CO2, H2O, C12H22O11, HCl, HNO3
Covalent Network
Atomic, network of covalent bonds, very high melting point, insoluble, always non-conductors, very hard, nonvolatile
Examples of Covalent Network
C (diamond), C(graphite), Si, Ge, P(red), SiC, BN, SiO2
Metallic
Positive ions surrounded by sea of electrons, wide range of melting points, conducts in solid or if melted, ranges from soft to hard, nonvolatile (except Hg)
Examples of Metallic
All metal and all alloys