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Exam 3 review
Supplemental Instruction
Iowa State University
Nevin
Chem 177
Kingston
11/18/13
Show the trend for atomic radius, ionization energy, electronegativity, electron affinity, and zeffective.
Which atom would have a bigger radius 𝐶𝑎2+ 𝑜𝑟 𝐶𝑙 − . Find the z effective for both.
Which of the following atoms would these successive values of ionization energies match most likely?
I1 = 578
I2 =1451
I3 = 7733
a) K
b) Al
c) Ca
d) O
e) F
Write an isoelectronic series in order of increasing atomic number for P, Cl, S, K, Ca
Supplemental Instruction
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Which of the two shows the electron affinity energy change
a) 𝑁𝑎(𝑔) → 𝑁𝑎+ + 𝑒 −
b) 𝑁𝑎(𝑔) + 𝑒 − → 𝑁𝑎−
Give an example of an element with positive electron affinity
Complete and balance the reactions
𝐾2 𝑂 + 𝐻2 𝑂 →
Metal Oxide + Water 
𝐶𝑂2 + 𝑁𝑎𝑂𝐻 →
Non-metal oxide + Base  ______ + _______
𝑆𝑂3 + 𝐻2 𝑂 →
Non-metal oxide + water 
What electronegativity difference would a bond be considered non polar, polar, and ionic?
Which has higher lattice energy?
NaCl
or
CaCl_2
What is the relationship between lattice energy and Atomic radius?
Draw the lewis dot structure for the following molecules:
Find Formal charges, show net polarity.
𝑁2
𝑆𝑂42−
HCN
Estimate the bond enthalpy for the following reaction:
2 𝐶𝐻4 (𝑔) + 𝑂2 (𝑔) → 2𝐶𝐻3 𝑂𝐻(𝑔)
1)
2)
3)
4)
5)
6)
Draw the lewis structures
Show net polarity
Show hybridization of each bond
List how many Sigma and Pi bonds there are
Write the geometry (Electron Domain Geometry and Molecular)
Predict the bond angles
XeF4
CH4
SF6
𝐶𝑙2 𝐶𝑂
NO3 –
Draw an MO Diagram for OF +, find the bond order, label as paramagnetic or diamagnetic.