The link you gave me is about ionic and covalent.
i was asking about metallic and covalent.
Yupz.......I know. It seems you really want to know.
But first you need to know more about covalent bonds. Normally there are two forms of covalent bondings namely simple molecular covalent bondings and giant covalent bondings.
Simple molecular structures consisting of bonds which are quite weak. However giant covalent structures consist of huge number of covalent bonds which together require loads of energy to break these bonds. This causes a dramatic rise in the strength of the covalent bonds.
examples of simple molecules : Carbon dioxide
Example of giant molecules : diamond
Hence metallic bonds are stronger than covalent bonds in simple molecular structure but weaker than those in giant covalent structures.
