Electromagnetic Spectrum and Light Chapters 17 and 18 Review Questions.
Chapters 6, 7, 8, and 9. Electronic structure of atoms: Electromagnetic Radiation:
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Transcript of Chapters 6, 7, 8, and 9. Electronic structure of atoms: Electromagnetic Radiation:
Unit 3Chapters 6, 7, 8, and 9
Electronic structure of atoms:
Electromagnetic Radiation:
Chapter 6: The electronic structure of atoms
Yellow light has a wavelength of 589 nm. What is the frequency of this radiation?
Example Problem
E = hv
Calculate the energy of one photon of yellow light with a wavelength of 589 nm.
Light and Energy
Electron Configuration
Condensed Electron Configurations
Electron Configuration of Ions
1) Which of the following pairs are isoelectronic?
a) Kr-, Br+
b) F-, Na+
c) Sc, Ti-
d) Be2+, Nee) Cs, Ba2+
Example Problems
2) Which of the following electron configurations represents an atom in an excited state?
a) 1s22s22p5
b) 1s22s22p53s2
c) 1s22s22p63s1
d) 1s22s22p63s23p5
e) 1s22s22p63s23p64s1
The periodic table:
Chapter 7: Periodic Properties of Elements
Effective Nuclear Charge
Sizes of Atoms and Ions
Ionization Energy
Electron Affinity
Which of the following properties generally decreases from left to right across a period?
(A) Electronegativity
(B) Electron affinity
(C) Atomic number
(D) Atomic Radius
(E) Maximum value of oxidation number
Example Problems
Which of the following explains why the Cl- ion is smaller than the S2- ion.
(A) Cl- has a more massive nucleus than S2-
(B) Cl- has a higer electronegativity than S2-
(C) Cl- has a greater nuclear charge than S2-
(D) Cl- has a greater number of electrons than S2-
(E) Cl- has more nucleons than S2-
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Chemical Bonds
Lewis Symbols
Octet Rule
Ionic Bonding
Lattice Energy
Covalent Bonding
Drawing Lewis Structures
Bond Length
Polar and Non-polar bonds
Some molecules have more than one possible correct Lewis structure.
Lewis Structures Cont.
Resonance Structures
Exceptions to the octet rule
Strengths of Covalent Bonds
Chapter 9: Molecular Geometry
Molecular Shapes and Polarity
Which of the following molecules has the shortest bond length?
(A) N2
(B) O2
(C) Cl2
(D) Br2
(E) I2
Example Problems
Which of the following molecules is non-polar?
(A) HCN
(B) NH3
(C) SO2
(D) NO2
(E) PF5
Of the following compounds which is most ionic?
(A) SiCl4
(B) BrCl
(C) PCl3
(D) Cl2O
(E) CaCl2