Between ionic, covalent and metallic, which is the strongest? I got really confused looking up on the internet, and found a lot of contradictory informations.

If I have to evaluate the strongest bond, maybe given a list of molecules, what do I do?

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    $\begingroup$ There is no definitive answer. For a given molecule, you determine the Gibbs free energy of formation relative to standard state precursors. Uniquely determining that a given bond is ionic, covalent, or metallic is either really hard or impossible. $\endgroup$ – Jon Custer Sep 22 '16 at 17:51
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    $\begingroup$ Strong covalent bond is pretty strong. Weak covalent bond is pretty weak. There is no such thing as bond strength of a covalent bond. Ditto for other types. $\endgroup$ – Ivan Neretin Sep 22 '16 at 17:53
  • $\begingroup$ @JonCuster but if I need to determinate which one between some given molecules is the strongest, how do I tell? $\endgroup$ – ennedes Sep 22 '16 at 17:59

To determine the relative bond strength difference, between any two atoms pairs. You can simply look up the measured bond strengths in kj/mol, or eV, at STP and directly compare. These values can be found in tables in every chemistry textboom.

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