Ionic Radius & its Trends

Ionic Radius & its Trends in periodic table

1. Submitted by:- Haseeb Shafqat Chem18111127(6B) Submitted to:- DR Sumreen ASIM TOPIC:- IONIC RADIUS

2. Ionic Radius Ionic radius is calculated by dividing the distance b/w two nuclei of two ions according to their sizes.

3. Cation:- by loss of electron Cation<parents atom? formation of effective nuclear charges increases sometime a shell may also decrease Anion:- by gain of electron anions>parents atom? formation of effective nuclear charges decreases.

4. Trends in periodic table Decrease across a period • Proton number increases • Effective nuclear charge increases • Stronger attraction between nucleus and valence electron • Thus, atomic radius decreases Increases down a group • Energy level increases • Shielding effect increases • Weaker attraction between nucleus and valence electrons • Thus, atomic radius increases.

5. Ionic Radius in a Period • Ionic Radius tends to decrease in size across the Periodic Table

6. Ionic Radius in a Group • Ionic Radius tends to increase down a Group

7. Summary Diagram

8. Question 1 • Which of the following is the smallest in size? • 1) N 3- • 2) O 2- • 3) F - • 4) Na +

9. Thank you