Atomic radius and ionic radius Theory | Explanation By K.Sivathiran Sir | (0770086416)

Hey everyone! If you’re racing towards your GCE A/L Chemistry exam, this one’s for you. In this video, we explain atomic radius and ionic radius in Tamil —what they are, why they change across the periodic table, and simple tips to remember each trend. We’ll cover: Atomic radius: Definition: half the distance between two bonded atoms of the same element Trends: why it decreases across a period and increases down a group Key factors: nuclear charge and electron shielding Ionic radius: Definition: size of a charged ion compared to its neutral atom Cations vs. anions: why positive ions are smaller and negative ions are larger Periodic trends: how ion size shifts with charge and position