Linus Pauling Noticed That the Energy of a Polar Bond

Multiple Choice

Linus Pauling noticed that the energy of a polar bond is often greater than expected.He attributed the greater bond energy to

A) a coulombic attraction between atoms with partially positive and negative charges.
B) the greater bond lengths of the heteronuclear bonds.
C) one of the many unexplainable phenomena that scientists encounter.
D) the ability of heteronuclear species to form double and triple bonds.
E) the greater number of valence electrons found in heteronuclear molecules.