Chapter 6

Chapter 6 - Chapter 5/6 Periodicity and Atomic Structure...

Info iconThis preview shows pages 1–14. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 5/6 Periodicity and Atomic Structure Lecture 14 (CHEM 1010) Agenda: Inclass Quiz Midterm B = please return to Gillian Exceptions to Hund’s Rule Atomic radii Cations and Anions and Ionic radii Ionization Energy Electron Affinity Born-Haber cycle Lattice Energy
Background image of page 1

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

View Full DocumentRight Arrow Icon
Background image of page 2
An Irregularity in Hund’s rule What is the electron configuration of Cr and Cu? The expected electron configuration of Cr is: [Ar]4s23d4 What is actually observed is: [Ar]4s13d5 Similarly for Cu what is observed is different then what is expected: [Ar]4s23d9 (expected) [Ar]4s13d10 (observed) Why?
Background image of page 3

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

View Full DocumentRight Arrow Icon
An Irregularity in Hund’s rule The energy difference between the 4s, 3d and 5s, 4d orbitals is small. There is a slight stability increase in having a half filled (d5) or completely filled d orbital (d10). This increased stability is greater then the stability lost by having an incomplete 4s or 5s orbital.
Background image of page 4
Valence electrons are the outer shell electrons of an atom. The valence electrons are the electrons that participate in chemical bonding. 1A 1 ns1 2A 2 ns2 3A 3 ns2np1 4A 4 ns2np2 5A 5 ns2np3 6A 6 ns2np4 7A 7 ns2np5 Group # of valence e- e- configuration Valence Electrons
Background image of page 5

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

View Full DocumentRight Arrow Icon
Classification of the Elements
Background image of page 6
ns1 ns2 ns2np1 ns2np2 ns2np3 ns2np4 ns2np5 ns2np6 d1 d5 d10 4f 5f Ground State Electron Configurations of the Elements
Background image of page 7

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

View Full DocumentRight Arrow Icon
Atomic radius
Background image of page 8
Atomic radius
Background image of page 9

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

View Full DocumentRight Arrow Icon
Atomic Radii
Background image of page 10
Atomic Radii and Zeff
Background image of page 11

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

View Full DocumentRight Arrow Icon
Atomic Radii Challenge Which atom in each of the following pairs would you expect to be larger? Explain. Mg or Ba W or Au Si or Sn Ce or Lu
Background image of page 12
Recap for Chapter 5 Light acts as both a particle and a wave. Equations
Background image of page 13

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

View Full DocumentRight Arrow Icon
Image of page 14
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 40

Chapter 6 - Chapter 5/6 Periodicity and Atomic Structure...

This preview shows document pages 1 - 14. Sign up to view the full document.

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