Strongest to weakest:
covalent >>>>>>> ionic >> ion-dipole = H-bonding > dipole-dipole >>>>> van der waals
Covalent bond is strongest by far since there is a sharing of electrons between two atoms.
Ionic is an electrical attraction between a metal and non-metal... much like the others types of interactions except stronger.
You people talk as if these sort of facts are open to discussion. Please don't confuse a poster by trying to remember an answer that you don't know for sure.
lovefororganic/redchesus are correct.
Right but this isn't theoretical chemistry. And when its a multiple choice test, you can't sit there debating yourself.
A bond is "an electrical force linking atoms ." Ionic bonds form when the electronegativity is great than a difference of 2 on the Pauling Electronegativity chart [sic]. Covalent bonds involve electronegativities lower than a difference of 2.
Consider the fact that many ionic compounds are solids at room temp (NaCl, KOH, etc.) while the covalent ones are liquids or gases (HCl, CH4, etc.). KCN, for example is a powder, while CH3CN is a liquid. Solubility in water isn't indicative of bond strength btw.
Breaking bonds gives off energy.