Ionic Radius Posted on 1st December 20155th October 2020 by ThePD (The Project Definition) Ionic Radius is a half the distance between the centres of two ions of the same element. Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Related Posted in Technology and tagged chemistry, science. ThePD (The Project Definition) ThePD has been developing the Preferred Project Definitions based on the actual project execution and operation experiences and knowledge with the Project Language, and sharing with you daily basis.