Questions and Answers
What is the usual charge of a cesium ion?
What is the mass of an electron in kilograms?
How many neutrons are present in the isotope Am-241?
Which of the following subshells has 6 electrons when referring to a cesium ion?
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What is the symbol for the element with 33 protons?
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Which constant represents the Rydberg constant in m⁻¹?
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What does the term 'lattice energy' refer to in ionic compounds?
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What is the value of Avogadro's number?
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What is the electron configuration for the Fe4+ ion?
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Which of the following statements about nodal planes of orbitals is true?
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How many carbon atoms are present in a 10.4 carat diamond?
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What volume of sand would have equaled the mass of the gold idol in Raiders of Lost Ark?
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What are the likely formulas for compounds A and B formed by xenon with fluorine?
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What is the energy carried by photons most directly associated with?
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How many unpaired electrons are present in the Co3+ ion?
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What is the weighted average atomic mass for silicon using the natural abundance of its isotopes?
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Study Notes
Chemistry Practice Exam Overview
- Covers topics from CHEM 103, relevant for understanding basic chemistry concepts.
- Includes equations for calculations involving energy, wavelength, mass, and atomic structures.
Key Equations
- Speed of Light: ( c = \lambda \nu )
- Energy of Photon: ( E = h\nu = \frac{hc}{\lambda} )
- Change in Energy: ( \Delta E = -2.178 \times 10^{-18} \left( \frac{1}{n_f^2} - \frac{1}{n_i^2} \right) )
- Rydberg Constant: ( R_{\infty} = 1.097 \times 10^{7} , \text{m}^{-1} )
Constants and Conversion Factors
- Speed of light: ( 2.998 \times 10^8 , \text{m/s} )
- Planck's Constant: ( h = 6.626 \times 10^{-34} , \text{J}\cdot\text{s} )
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Electrons and Charge:
- Electron mass: ( 9.11 \times 10^{-31} , \text{kg} )
- Electron charge: ( -1.602 \times 10^{-19} , \text{C} )
- Avogadro's Number: ( N_A = 6.022 \times 10^{23} , \text{mol}^{-1} )
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Conversion factors:
- ( 1 , \text{g} = 4.878 , \text{carats} )
- ( 1 , \text{L} = 1000 , \text{cm}^3 )
Short Answer Questions Focus
- Element symbols and usual charges (e.g., cesium).
- Definitions of isotopes and electron configurations.
- Importance of outermost subshells.
Orbital Sketches
- Understanding of different orbital types:
- 1s: spherical shape.
- 2p: bilobed shape with nodal planes.
- 3d: complex shapes with multiple nodal planes.
Numerical Problems
- Calculate carbon atoms in a diamond using carat weight.
- Calculate equivalent volume of sand for a gold idol based on densities.
- Determine formulas for xenon compounds based on reaction with fluorine.
- Calculate the weighted average atomic mass of silicon isotopes.
Transition Energy Calculation
- Energy transitions in ions (e.g., Li2+) when electrons move between levels.
Multiple Choice Concepts
- Relationship between photon energy and properties: focused on frequency.
- Understand unpaired electron configurations in transition metal ions like Co3+.
Exam Integrity
- Emphasis on academic honesty with the W&M honor pledge.
- Importance of showing all work for maximum partial credit.
Studying That Suits You
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Description
Prepare for your Chemistry 103 Semester Exam with this practice exam designed for Sections 1 and 2. The exam covers essential topics and requires you to show all work for maximum partial credit. Test your knowledge and boost your confidence with this helpful resource.
