Solids/Crystals

Crystalline Solids

rigid, well defined structure
Cooled slowly

Amorphous Solid

lack a well defined shape
cooled very fast

Ionic Crystals

Ionic bonds hold it together

Physical characteristics: Hard, brittle, High Melting, poor electricity and heat conductors
When dissolved it is good at conducting

coulombs law - smaller ionic radius the greater bond strength, greater + or - charge greater bond strength

Metallic Crystals

Made of metal atoms and held together by delocalized e-

PC: range os hardness and melting points, good conductors, malleable, ductile

Covalent Crystals

Network of same non-metal atoms covalently bonded

PC: hard, high melting, usually poor E and Heat conductors.
Graphite can conduct though

Molecular Crystals

Held together by IMFS.

PC: soft, low melting, poor conductors

Substitutional Alloy

Only a few metal atoms are replaced with another

Interstitial Alloy

smaller atoms are wedged in between larger ones, increases hardness