Why is the bond between 2 oxygen atoms stronger than the bond between 2 fluorine atoms?

Expert Solution

The F₂ molecule is exactly one bond (in other words, a bond order of 1) provided by one p electron per atom

The covalent radius of fluorine of about 71 picometers found in F₂ molecules is significantly larger than that in other compounds because of this weak bonding between the two fluorine atoms.This is a result of the relatively large electron and internuclear repulsions, combined with a relatively small overlap of bonding orbitals arising due to the small size of the atoms.

But O₂ has a bond length of 121 pm and a bond energy of 498 kJ·mol⁻¹. An oxygen atom has 6 electrons in its outer shell. Two oxygen atoms will each share two electrons to form two covalent bonds and make an oxygen molecule (O₂). because 2 covalent bonds it is very stronger.

queen_honey_blossom answered 2 years ago

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