Review Topics: Chapter 3 CHEM 1A

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Review Topics: Chapter 3
CHEM 1A
Covered in Lecture:

Ion formation and size
o Noble gas electron configurations
o Metals versus non-metals
o Gain and loss of electrons
 which electrons are lost first
o Size relative to neutral parent atom
 attractive force between positive nucleus and negative electrons
 electron – electron repulsion

Periodic trends
o Atomic radii (covered in Chapter 2, section 2.14)
o Ionization energy
 relative magnitudes of subsequent ionization energies
 dips in periodic trends
o Electron affinity
o Electronegativity
o Metallic behavior
o Acidity of oxides
o Acidity of nonmetal hydrides

Chemical bonding
o Interacting atoms: why bonds form
o Electronegativity and types of bonds
o Approximate difference in electronegativity cutoffs

Ionic bonding
o Diff. EN > 1.7
o How the ions are held together in the solid
o Properties of ionic solids
 melting points
 hardness
 cleavage
 conductivity
o Lattice energy (Hlattice)
 Coulomb’s law (charges and distance)
 predicting relative lattice energies for various ionic compounds
 effect of lattice energy on melting point, hardness, and solubility in water
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Covered in Lab (Nomenclature Worksheet):

Formation of ions and common ionic charges
o Using the periodic table to predict the ionic charges of representative (main group)
elements and select other elements

Nomenclature
o Ionic compounds
 simple binary ionic compounds
 monovalent and polyvalent metals and the stock system
 polyatomic ions and oxyanions
Manage your time wisely as you study. Cover all the basic concepts before delving too deeply into any one
topic. If you have a specific question, you can e-mail me at [email protected] I will reply to e-mails
several times the night before an exam. Continue to study other topics while you wait for a response.
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