Answer: The elements which have zero electron affinity are Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), Radon (Rn), and Oganesson (Og).
Electron affinities can be positive, negative, or zero. It is difficult to measure electron affinities. The values were determined by the measurements of lattice energies and heat of formation of ionic compounds of the elements. This property is utilized to calculate atoms and molecules in the gaseous state only.
Which element has Zero Electron Affinity?
The elements that have zero electron affinity are Neon, Argon, Helium, Krypton, Xenon, Radon, and Oganesson.