TYPES OF SOLIDS

 
AMORPHOUS SOLIDS with no orderly arrangement
Type Bonds Structural units Melting points Examples
AMORPHOUS Weak, interatomic or
intermolecular
Atoms or molecules Moderate SiO2 (glass)
CRYSTALLINE SOLIDS with orderly arrangements
MOLECULAR Weak, intermolecular Molecules Low H2O (ice),
CO2 (dry ice)
IONIC Electrical attractions + and - ions High NaCl (salt), CaCO3
ATOMIC: COVALENT Covalent bonds Atoms Very high C (diamond)
ATOMIC: METALLIC Interatomic Atoms, plus loose electrons Wide variation:
Hg -39oC, W 3410oC;
most betw. 100-2000
Fe (iron),
Cu (copper)


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