Chemistry 103 Practice Exam

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?

What is the symbol for the element with 33 protons?

Which constant represents the Rydberg constant in m⁻¹?

What does the term 'lattice energy' refer to in ionic compounds?

What is the value of Avogadro's number?

What is the electron configuration for the Fe4+ ion?

Which of the following statements about nodal planes of orbitals is true?

How many carbon atoms are present in a 10.4 carat diamond?

What volume of sand would have equaled the mass of the gold idol in Raiders of Lost Ark?

What are the likely formulas for compounds A and B formed by xenon with fluorine?

What is the energy carried by photons most directly associated with?

How many unpaired electrons are present in the Co3+ ion?

What is the weighted average atomic mass for silicon using the natural abundance of its isotopes?

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} )
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} )
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.

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.