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

Solution: Calculate the energy of a photon emitted when an electron in a hydrogen atom relaxes from n = 5 to n = 3?

Problem

Calculate the energy of a photon emitted when an electron in a hydrogen atom relaxes from n = 5 to n = 3?

Solution

We have to determine the energy of the photon emitted when an electron in a hydrogen atom relaxes from n=5 to n=3.

The energy change that is accompanied when an electron falls from a higher energy level to a lower energy level is given by the Bohr equation.

E = -RH1nfinal2-1ninitial2

Where, RH = Rydberg constant = 2.18x10-18 J

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