Final answer:
Covalent bonds involve electron sharing, ionic bonds involve electron transferring, and metallic bonds feature electron pooling. Electron neutrality is not a similarity across all three bond types.
Step-by-step explanation:
The question concerns the similarities between covalent, metallic, and ionic bonds. Ionic bonds involve the transfer of electrons from one atom to another, forming charged ions that are attracted to one another.
Covalent bonds, on the other hand, involve the sharing of electrons between atoms in order to achieve a stable electron configuration. Metallic bonds are characterized by a "sea" of delocalized electrons known as an electron pooling, where the electrons are free to move throughout the entire metal structure.
What these bonds all have in common is that they all involve interactions around the outer electrons of atoms. One option that is not similar across these bond types is electron neutrality, as ionic compounds do not exhibit electron neutrality in the same way as covalent and metallic compounds do due to the full transfer of electrons.