Compounds that are ductile and excellent conductors of electricity have * covalent bonds.
ionic bonds.
isotopic bonds.
metallic bonds.

metallic bonds.

Explanation:

Generally, compounds that are ductile and excellent conductor of electricity have metallic bonds between them.

These compounds are usually metals.

Metallic bond join that atoms of metals and alloys together. The formation of this type of bond is favored by large atomic radius, low ionization energy and a large number of electrons in their valence shell. The physical properties of metals like ductility, malleability, electrical and thermal conductivity all results from metallic bonds.

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