This chemistry video tutorial provides a basic introduction into the periodic trends of the ionic radius of ions. It explains how to rank in order of increasing ionic radii - the sizes of isoelectric ions - which are ions that have the same number of electrons and the same electron configuration. Anions are usually bigger than cations. New Chemistry Video Playlist: https://www.youtube.com/watch?v=bka20Q9TN6M&t=25s&list=PL0o_zxa4K1BWziAvOKdqsMFSB_MyyLAqS&index=1 Access to Premium Videos: https://www.patreon.com/MathScienceTutor Facebook: https://www.facebook.com/MathScienceTutoring/