Ionization Energy By Malik Xufyan
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Muhammad Sufyan from Chenab College Jhang presented on ionization energy. Ionization energy is the minimum amount of energy required to remove an electron from a neutral gaseous atom to form a cation. Across a period, ionization energy increases as atomic number increases because the nuclear charge is stronger, attracting electrons more tightly. Down a group, ionization energy decreases as atomic size increases with more electron shells, holding electrons more loosely. Factors that influence ionization energy include atomic size, nuclear charge, orbital nature, and shielding effects. Ionization energy can indicate metallic character and help predict elemental valency.
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Ionization Energy By Malik Xufyan
- 2. Chenab College Jhang Ionization Energy (Demonstration topic) Presented by: Muhammad Sufyan Chenab College Jhang
- 3. Chenab College Jhang Personal information Name Muhammad Sufyan Department Quality Assurance SML Date of joining 15-02-2017 Home District Jhang Academic Record M.Sc. Chemistry University Government College University Faislabad Session 2013-2015
- 4. Contents • Modern Periodic Table & I.E • Ionization Energy • General Example • Periodic Trend • Factors • Applications Chenab College Jhang 01 of 35 Slide Number 02 03 04 05 22 26
- 6. IONIZATION ENERGY (I.E) OR IONIZATION POTENTIAL The energy needed to remove one or more electrons from a neutral gaseous atom and convert it into a positively charged gaseous ion. Chenab College Jhang 03 of 32
- 7. Chenab College Jhang M + I.E M+ + e- General Example: 04 of 32
- 8. Chenab College Jhang 05 of 32 Periodic Trend
- 9. Chenab College Jhang Li Be B C N O F (2,1) ( 2,2 ) (2,3 ) (2,4 ) (2,5) (2,6 ) (2,7) 3 4 5 6 7 8 9 520 900 801 1086 1402 1314 1681 KJ/mol KJ/mol KJ/molKJ/molKJ/mol KJ/mol KJ/mol Across Period Number of Protons 06 of 32
- 10. Chenab College Jhang Li Be B C N O F (2,1) ( 2,2 ) (2,3 ) (2,4 ) (2,5) (2,6 ) (2,7) 3 4 5 6 7 8 9 520 900 801 1086 1402 1314 1681 KJ/mol KJ/mol KJ/molKJ/molKJ/mol KJ/mol KJ/mol Across Period Number of Protons Ionization energy Increases 07 of 32
- 11. Chenab College Jhang Atomic Number Increased 08 of 32
- 12. Chenab College Jhang Atomic Number Increased Nuclear Charge increased 09 of 32
- 13. Chenab College Jhang Atomic Number Increases Nuclear Charge increases Atomic Size Decreases 10 of 32
- 14. Chenab College Jhang Atomic Number Increases Nuclear Charge increases Atomic Size Decreases Electrons are held tightly hence greater energy is required to remove electron 11 of 32
- 15. Chenab College Jhang Atomic Number Increases Nuclear Charge increases Atomic Size Decreases Electrons are held tightly hence greater energy is required to remove electron Ionization energy increases 12 of 32
- 16. Chenab College Jhang Mg Mg+ Mg++ (2,8,2) (2,8,1) (2,8) 1450 KJ/mol Mg + I.E Mg+ e- Mg+ + I.E Mg++ e- 738 KJ/mol H H 13 of 32
- 17. Chenab College Jhang Cations are always smaller than Neutral atom I.E 1 < I.E 2 < I.E 3 14 of 32
- 18. Chenab College Jhang H Li Na K Rb (1) (2,1) (2,8,1) (2,8,8,1) (2,8,18,8,1) (419) (403) (496) (520) (1313) E.C I.E KJ/mol Elements Down the Group 15 of 32
- 19. Chenab College Jhang H Li Na K Rb (1) (2,1) (2,8,1) (2,8,8,1) (2,8,18,8,1) (419) (403) (496) (520) (1313) E.C I.E KJ/mol Elements Down the Group Ionization energy Decreases 16 of 32
- 20. Chenab College Jhang Nuclear Charge Increases 17 of 32
- 21. Chenab College Jhang Nuclear Charge Increases Number of shell Increases 18 of 32
- 22. Chenab College Jhang Nuclear Charge Increases Number of shell Increases Atomic size Increases 19 of 32
- 23. Chenab College Jhang Nuclear Charge Increases Number of shell Increases Atomic size Increases Electrons are held loosely , hence lesser energy is required to remove the electrons 20 of 32
- 24. Chenab College Jhang Nuclear Charge Increases Number of shell Increases Atomic size Increases Electrons are held loosely , hence lesser energy is required to remove the electrons Ionization Energy Increases 21 of 32
- 25. Chenab College Jhang Factors ❑Atomic Size 22 of 32
- 26. Chenab College Jhang Factors ❑Atomic Size ❑Number of Protons 23 of 32
- 27. Chenab College Jhang Factors ❑Atomic Size ❑Number of Protons ❑Nature of Orbital 24 of 32
- 28. Chenab College Jhang Factors ❑Atomic Size ❑Number of Protons ❑Nature of Orbital ❑Shielding Effect 25 of 32
- 29. Chenab College Jhang Applications Index of Metallic Character 26 of 32
- 30. Chenab College Jhang Applications Index of Metallic Character Elements having Low I.E -------------- Metals 27 of 32
- 31. Chenab College Jhang Applications Index of Metallic Character Elements having Low I.E -------------- Metals Elements having High I.E ---------- Non Metals 28 of 32
- 32. Chenab College Jhang Applications Index of Metallic Character Elements having Low I.E -------------- Metals Elements having High I.E ---------- Non Metals Elements having moderate I.E ------- Metalloids 29 of 32
- 33. Chenab College Jhang Applications Valency of elements 30 of 32
- 34. Chenab College Jhang Applications Valency of elements The gap in first, 2nd and 3rd Ionization Energy help us to guess the valency of an element 31 of 32
- 35. Chenab College Jhang Applications Valency of elements The gap in first, 2nd and 3rd Ionization Energy help us to guess the valency of an element If difference between 1st and 2nd I.E is sufficient high then valency of an element is one 32 of 32