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Lon-Capa

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6th HW assignment due Friday, 11/4, 5 pm.
It is open now.
5th Quiz due Sunday, 11/13 by 10 pm. It will
open Friday, 11/11 at 5 pm.
1
Clicker Question
Consider different “sodium particles”
(atom or ions) in separate evacuated
containers. Which of the following
sodium species is lowest in energy?
a)
b)
c)
d)
e)
Na
Na+
Na2+
Na
Na2
2
Clicker Question
Consider different “oxygen particles” (atom or
ions) in separate evacuated containers.
Which of the following oxygen species is
lowest in energy?
a)
b)
c)
d)
e)
O
O+
O2+
O
O2
3
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)
b)
c)
d)
e)
O
O+
O2+
O
O2
4
Four Trends to Understand
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Atomic radius
Ionization Energy
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Electron Affinity
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Energy required to remove an electron from
a gaseous atom (or cation).
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.
5
6
IE vs. Atomic Number
7
Successive IEs
8
EA vs. Atomic Number
9
10