Ch.7 - Quantum MechanicsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds
Wavelength and Frequency
Speed of Light
The Energy of Light
Electromagnetic Spectrum
Photoelectric Effect
De Broglie Wavelength
Heisenberg Uncertainty Principle
Bohr Model
Emission Spectrum
Bohr Equation
Introduction to Quantum Mechanics
Quantum Numbers: Principal Quantum Number
Quantum Numbers: Angular Momentum Quantum Number
Quantum Numbers: Magnetic Quantum Number
Quantum Numbers: Spin Quantum Number
Quantum Numbers: Number of Electrons
Quantum Numbers: Nodes
Additional Practice
Diffraction vs Refraction
Quantum Numbers: Emission Spectrum
Dimensional Boxes

The De Broglie Wavelength equation relates wavelength to velocity or speed. 

De Broglie Wavelength

Concept #1: The De Broglie Wavelength Equation 

Example #1: Find the wavelength of a proton with a speed of 6.25 x 105 m/s. (Mass of a proton = 1.67 x 10-27 kg)

Practice: What is the velocity (in m/s) of an electron that has a wavelength of 3.13 x 105 pm? (Mass of an electron = 9.11 x 10-31 kg).

Practice: The faster an electron is moving, the _________ its kinetic energy, and the __________ its wavelength.

Practice: Consider an atom traveling at 1% the speed of light. The de Broglie wavelength is found to be 7.1316 x 10-39 m. Which element is this?