Search
- https://chem.libretexts.org/Bookshelves/General_Chemistry/General_Chemistry_Supplement_(Eames)/Quantum_Chemistry/Discovery_of_QuantizationHe assumed that the lines in the spectrum come from electrons moving from one stable orbit to another, and the wavelength of the light emitted equals the energy difference of the orbits.
- https://chem.libretexts.org/Bookshelves/General_Chemistry/Map%3A_General_Chemistry_(Petrucci_et_al.)/08%3A_Electrons_in_Atoms/8.03%3A_Quantum_TheoryWhen a metal is struck by light with energy above the threshold energy E o , the number of emitted electrons is proportional to the intensity of the light beam, which corresponds to the number of phot...When a metal is struck by light with energy above the threshold energy E o , the number of emitted electrons is proportional to the intensity of the light beam, which corresponds to the number of photons per square centimeter, but the kinetic energy of the emitted electrons is proportional to the frequency of the light.
- https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Physical_Chemistry_(LibreTexts)/01%3A_The_Dawn_of_the_Quantum_Theory/1.03%3A_Photoelectric_Effect_Explained_with_Quantum_HypothesisThis page discusses the photoelectric effect, highlighting the threshold frequency for electron emission and its demonstration of light's dual wave-particle nature. Einstein’s quantum theory explains ...This page discusses the photoelectric effect, highlighting the threshold frequency for electron emission and its demonstration of light's dual wave-particle nature. Einstein’s quantum theory explains the relationship between light frequency and the energy of ejected electrons, while the work function represents the energy needed to remove an electron from a metal. Initial resistance to these ideas was later overcome by Millikan's confirmation.
- https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Introductory_Chemistry_(CK-12)/05%3A_Electrons_in_Atoms/5.05%3A_Atomic_Emission_SpectraThis page explains the principles of energy conversion through archery, where kinetic energy is transformed to potential energy and back to kinetic energy upon release. It parallels atomic emission sp...This page explains the principles of energy conversion through archery, where kinetic energy is transformed to potential energy and back to kinetic energy upon release. It parallels atomic emission spectra, where energy excites electrons in an atom, leading to light emission at specific wavelengths when they return to lower energy states. This quantized behavior challenges classical physics and aligns with quantum theory.
- https://chem.libretexts.org/Courses/University_of_Alberta_Augustana_Campus/AUCHE_110_-_General_Chemistry_I_(Elizabeth_McGinitie)/02%3A_Atomic_Structure_and_Periodic_Trends/2.02%3A_Quantum_TheoryWhen a metal is struck by light with energy above the threshold energy E o , the number of emitted electrons is proportional to the intensity of the light beam, which corresponds to the number of phot...When a metal is struck by light with energy above the threshold energy E o , the number of emitted electrons is proportional to the intensity of the light beam, which corresponds to the number of photons per square centimeter, but the kinetic energy of the emitted electrons is proportional to the frequency of the light.
- https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Introductory_Chemistry_(CK-12)/05%3A_Electrons_in_Atoms/5.06%3A_Bohr's_Atomic_ModelThis page explores the analogy of climbing a ladder to explain potential energy and Niels Bohr's 1915 atomic model, where electrons occupy fixed energy states around the nucleus. It describes how elec...This page explores the analogy of climbing a ladder to explain potential energy and Niels Bohr's 1915 atomic model, where electrons occupy fixed energy states around the nucleus. It describes how electrons can gain or emit energy, often as light, when transitioning between these states. While effective for hydrogen, the model's limitations with other elements led to revisions in atomic theory.
- https://chem.libretexts.org/Courses/University_of_Alberta_Augustana_Campus/AUCHE_230_-_Structure_and_Bonding_(Elizabeth_McGinitie)/01%3A_Atomic_Structure/1.03%3A_Quantum_TheoryWhen a metal is struck by light with energy above the threshold energy E o , the number of emitted electrons is proportional to the intensity of the light beam, which corresponds to the number of phot...When a metal is struck by light with energy above the threshold energy E o , the number of emitted electrons is proportional to the intensity of the light beam, which corresponds to the number of photons per square centimeter, but the kinetic energy of the emitted electrons is proportional to the frequency of the light.
- https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Physical_Chemistry_(LibreTexts)/zz%3A_Back_Matter
- https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Physical_Chemistry_(LibreTexts)/21%3A_Entropy_and_the_Third_Law_of_Thermodynamics/21.07%3A_Standard_Entropies_Depend_Upon_Molecular_Mass_and_StructureThis page explains the relationship between entropy and microstates in particles, highlighting that increased molecular mass results in lower energy state spacing and higher entropy. It notes that nob...This page explains the relationship between entropy and microstates in particles, highlighting that increased molecular mass results in lower energy state spacing and higher entropy. It notes that noble gases exemplify this trend, as their molar entropy rises with mass. Furthermore, it mentions that molecules with more atoms tend to have greater energy dispersion and entropy due to additional degrees of freedom for energy states.
- https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Physical_Chemistry_(LibreTexts)/30%3A_Gas-Phase_Reaction_Dynamics/30.10%3A_The_Potential-Energy_Surface_Can_Be_Calculated_Using_Quantum_MechanicsThis page covers Potential Energy Surfaces (PES), which illustrate the potential energy of atomic systems based on their configurations, favoring stable structures at energy minima. It discusses PES i...This page covers Potential Energy Surfaces (PES), which illustrate the potential energy of atomic systems based on their configurations, favoring stable structures at energy minima. It discusses PES in the context of exchange reactions involving hydrogen and deuterium, detailing specific reaction pathways and highlighting transition states.
