Lon-Capa 6 th HW assignment due Friday, 11/6, 5 pm. It is open now. 5 th Quiz due Sunday, 11/15 by 10 pm. It will open Friday, 11/13 at 5 pm. 1.

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Presentation transcript:

Lon-Capa 6 th HW assignment due Friday, 11/6, 5 pm. It is open now. 5 th Quiz due Sunday, 11/15 by 10 pm. It will open Friday, 11/13 at 5 pm. 1

Four Trends to Understand Atomic radius Ionization Energy Energy required to remove an electron from a gaseous atom (or cation). Electron Affinity Energy change associated with the addition of an electron to a gaseous atom or ion. Electronegativity Ability of an atom in a molecule to attract shared electrons to itself. 2

3

IE vs. Atomic Number 4

Successive IEs 5

EA vs. Atomic Number 6

Clicker Question Consider different “sodium particles” (atom or ions) in separate evacuated containers. Which of the following sodium species is lowest in energy? a)Na b)Na + c)Na 2+ d)Na  e)Na 2  7

Clicker Question Consider different “oxygen particles” (atom or ions) in separate evacuated containers. Which of the following oxygen species is lowest in energy? a)O b)O + c)O 2+ d)O  e)O 2  8

Clicker Question Consider different “oxygen particles” (atom or ions) in separate evacuated containers. Which of the following oxygen species is second lowest in energy? a)O b)O + c)O 2+ d)O  e)O 2  9

10

11

Successive IEs 12

Sizes of Ions 13

The Structure of Lithium Fluoride (ionic solid) 14

Percent Ionic Character 15