Which group on the periodic table would have zero electronegativity because they have a full octet?

Inert or noble gases

alkaline earth metals

halogens

The group on the periodic table that would have 0 electronegativity due to the fact that their valence shell is full, i. e, have a full octet would be the inert or noble gases. They have a total of 8 electrons in their valence shell and are thus inert and cannot strongly attract electrons toward itself, from neighbouring atom electrons as it does not need to.