10CHM11509 HIK full lecture

10CHM11509 HIK full lecture - CHM 115 Dr. Hilkka Kenttmaa...

Info iconThis preview shows pages 1–13. Sign up to view the full content.

View Full Document Right Arrow Icon
CHM 115 Dr. Hilkka Kenttämaa Lecture 10 Reading was 9.1-9.3: Chemical Bonding Lecture 11: 9.4, 9.10
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Cl + e - Cl - H = -349 kJ/mol Energy is released EA is the energy released upon addition of an electron to an atoms Follows the opposite trend to IE. Electron Affinity (EA)
Background image of page 2
Electron Affinities (EA) of Main Group Elements difficult to add an electron beyond a full orbital Positive EA : added e is not bound Smaller atom: greater EA!
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Orbital Energy Diagram for a many-electron atom Energy of Orbitals
Background image of page 4
Electron Affinities (EA) of Main Group Elements highest for halogens difficult to add an electron beyond a full orbital or shell Positive EA : added e is not bound Smaller atom: greater EA!
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Electron Affinities (EA) of Main Group Elements difficult to add an electron beyond a full orbital or shell Half-filled p-orbitals ! Smaller atom: greater EA!
Background image of page 6
N : o : 1s 2 2s 2 2p 3 1s 2s 2p 1s 2 2s 2 2p 4
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Electron Affinities (EA) of Main Group Elements Smaller atom: greater EA! EA ordering?
Background image of page 8
Orbital Energy Diagram for a many-electron atom Energy of Orbitals Be B Ca Sc Sc = Scandium
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Electron Affinities (EA) of Main Group Elements nuclear attraction: smaller atom = greater EA orbital and shell energy levels e-e repulsion in small atoms
Background image of page 10
Energy needed/released to add an extra electron (EA) depends on what’s below Orbital Energy Diagram for a many-electron atom
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Increase in size within shell from decreasing nuclear charge Greater ionization energy within shell from increasing nuclear charge Greater electron affinity within shell with increasing nuclear charge Add electron to form noble gas
Background image of page 12
Image of page 13
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/06/2012 for the course CHM 115 taught by Professor Towns during the Spring '08 term at Purdue University.

Page1 / 39

10CHM11509 HIK full lecture - CHM 115 Dr. Hilkka Kenttmaa...

This preview shows document pages 1 - 13. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online