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.

7. 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.

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

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

11. Summary Diagram

12. Question 1
• Which of the following is the smallest in
size?
• 1) N3-
• 2) O2-
• 3) F-
• 4) Na+

13. Thank you