急急急 .. 關於chem既

For covalent ones:
1-mp/bp: similar
2-conductivity: no
3-solubility:some of them soluble in organic solvent
4-bonding: covalent bond between each atom (some's a giant network structure,like C14)
5-components: non metal elements

For ionic ones:
1-mp/bp:similar
2-conductivity : electrical when dissloved in solvent
3-solubility: soluble in water and some,either inorganic solvent
4-bonding: ionic bond between each atom to form giant ionic structure
5-components: non metal elements and metal elements

covalent:
(1)simple molecular structure
　-mp low,bp low
　-conductivity=0
(2)giant molecular structure
　-mp/bp high
　-conductivity=0

ionic
mp/bp high
conductivity=0 if solid;only conduct electricity in molten/aqueous state