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: Change in energy states for absorption and emission.Which transition will lead to the emission of light with longer wavelength?

Problem

The ground state is n equals 1, at an energy of -218 times 1020 joules per atom. The energy at n equals 2 is much greater, at around -80 times 1020 joules per atom.  The jump to n equals 3 is smaller, at around -40 times 1020 joules per atom, and n equals 4 is around -25 times 1020 joules per atom. A level of 0 energy is at n equals infinity.  All states 2 and higher (every state except the ground state, n equals 1) are excited states.  The transition from ni equals 2 to nf equals 1 has a delta-E less than 0, meaning a photon is emitted. The transition from ni equals 1 to nf equals 2 has a delta-E greater than 0, meaning a photon is absorbed.

Change in energy states for absorption and emission.

Which transition will lead to the emission of light with longer wavelength?