Arranging the pairs from strongest to weakest attraction :
- Nonpolar molecule and Nonpolar molecule ( B )
- Polar molecule and Polar molecule ( A )
- Polar molecule and Ion ( C )
- Ion and Ion ( D )
Covalent bonds are the strongest bonds because it involves the sharing of electrons between two binding atoms therefore the atoms are not dissociated easily. Also covalent bonds are divided into ;
- Polar covalent bonds ; The shared electrons from each atom involved are unequal therefore it is easier to dissociate polar molecule bonds ( i.e. weaker bond ).
- Non Polar covalent bonds ; The shared electrons from each atoms are equally therefore it is harder to dissociate nonpolar molecule bonds ( i.e. stronger bond when compared to polar bonds ).
While Ionic bonds involves the transfer of electrons from a donor atom to another atom and such bonds are easily broken and it is a weaker bond when compared to Polar and Nonpolar bonds. therefore polar molecule and ion bond pair is stronger than ion and ion pair.
Hence we can conclude that ranking the pairs from strongest to weakest attraction is as follows; Nonpolar molecule and Nonpolar molecule, Polar molecule and Polar molecule, Polar molecule and Ion, Ion and Ion.
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