Lattice Energy - the energy required to convert one mole of an ionic solid into gaseous ionic constituents

Interstitial Alloy - an alloy made up of metal atoms with two vastly different radii

Substitutional Alloy - an alloy made up of metal atoms of similar radii

Network Solid - a molecule in which the atoms are held together in a lattice of covalent bonds - very hard and have high melting and boiling points

Hybridization - mixing atomic orbitals to form new hybrid orbitals suitable for the pairing of electrons to form chemical bonds (electronic domain - 1)