Bond Type	Generally Formed Between	Bond Formed By	Properties Associated with bond type	Example of substances Utilizing bonf type
Covalent	Atoms of non-metallic elements of similar electronegativity	Sharing of electron pairs	Stable non ionizing molecules-not conductors of electricity in any ohase	C2H5
Ionic	Atoms of metallic and non-metallic elements of wide.y different electronegativities	Elec. attraction between ions resulting from transfer of electrons fron one to another	Charged ions in gas liwuid and soid. Sokid is electrically non- sonducting. Gas and liquid are condustors	NaCl, K2O, BaS, LiH
Metallic	Atoms of metallic elements	Common exchange of outer electrons between atons of low electronegativity	Electrical conductors in all ohases, luster	Na, Au, Cu. Zn
Dipole	Polar covalent molecules	Electrical attraction between dioples resulting from polar bonds	Substances have higher boiling and melting points than those having non-polar molesules of similar size	ICl, SO2
Hydrogen	Molecules having hydrogen attached to atim of high electronegativity	Attraction of exposed proton to electronegative atom in neigh boring molecule	substances have mush higher boiling and melting points than those having non-polar molecules of similar size	H2O, HF
Dispersion Forces	Non polar molecules	Weak electrical fluctuations which destroy spherical symmetry of electronic fields about atoms	Substanve have soft crustals and comparaticeley low melting and boiling points	He, Ar, Cl2,CH4

Special covalent

NETWORK CRYSTAL - carbon, silicon - HIGH m.p. S₁C₂, C, S₁O₂