• Bond energy is the energy required to break a covalent bond between two atoms.
  • A high bond energy means that a bond is strong and the molecule that contains that bond is likely to be stable and less reactive.
  • The halogen elements all exist naturally as diatomic molecules (F2, Cl2, Br2, and I2) They are generally very reactive and thus have relatively low bond energies.
  • The higher the bond energy, the less reactive the bond is.
  • The triple bond that exists between the nitrogen atoms in nitrogen gas (N2) makes it very unreactive.
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