Atomic Structure and Atomic Spectra (CH 13)

Atomic Structure and Atomic Spectra (CH 13). A hydrogenic atom is a one-electron atom or ion of general atomic number Z ; H, He + , Li 2+ ,… A many-electron atom is an atom or ion with more than one electron. The SWE can be solved exactly only for hydrogenic atoms.

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PHY206: Atomic Spectra

PHY206: Atomic Spectra. Lectures 5 - 8. Lectures 5-8: Outline. The Schrodinger equation in 3D Introduction: Wave Equations Separation of Variables Radial Schrodinger Equation The Hydrogen Atom Energy Levels, Eigenfunctions Angular Shapes Quantum Mechanics of the Hydrogen atom

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Atomic Spectra

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Atomic Spectra

Atomic Spectra. Continuous Spectra. The (Visible) Hydrogen Spectrum. Other Spectra. Notes on the Procedure. Do steps 3-5 in part A Measure at least 3 of the 4 hydrogen lines (the deep purple one may be really hard to see) In report, give % errors for the measured hydrogen lines.

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3. Atomic structure and atomic spectra

3. Atomic structure and atomic spectra. 3.1. Structure and spectra of hydrogenic atoms 3.1.1 The structure of hydrogenic atoms 3.1.2 Atomic orbitals and their energies 3.1.3 Spectroscopic transitions and selection rules 3.2. The structure of many electron atoms

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Atomic Spectra

The atom. Atomic Spectra. If you “engergize” an atom in a variety of ways, it will give off light with characteristic wavelengths What wavelengths you get are a characteristic of the atom. There were patterns in the wavelengths, but no one understood why Triplets were not uncommon.

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IB1 Chemistry Atomic Structure 3 2.3 Emission spectra

IB1 Chemistry Atomic Structure 3 2.3 Emission spectra. Clues to electronic structure. periodicity of elements emission spectra ionization energies. Electromagnetic spectrum. c = f λ where c is the speed of light, f is the frequency and λ is the wavelength. Flame tests. Dispersion.

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Atomic Emission Spectra

Atomic Emission Spectra. First Ionization Energies. IE Excel File. He. Ne. F. N. O. C. Be. B. Li. Successive Ionization Energies (kJ/ mol ). Photoelectron Spectroscopy. based on photoelectric effect monochromatic light shone on sample, causes e- to be emitted

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ATOMIC SPECTRA

ATOMIC SPECTRA. Objectives 1. Determine the emission spectrum of Hydrogen and other elements. 2. Calculate the expected wavelengths of H using the Rydberg equation. 3. Determine the composition of unknown solutions using flame tests.

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Atomic Emission Spectra

Atomic Emission Spectra. Specific wavelengths and frequencies of light produced by energized atoms. Electrons move shells. Ground State. Excited State. Electrons in normal location; stable and low energy Absorb energy and jump UP to ….

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Atomic Emission Spectra

Atomic Emission Spectra. The Electromagnetic Spectrum. High frequency Short wavelength High energy. lower frequency longer wavelength lower energy. Emission of Light. When electrons are excited they can move to a higher energy level.

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Atomic Structure and Atomic Spectra

Atomic Structure and Atomic Spectra. Chapter 10. Spectra of complex atoms. Energy levels not solely given by energies of orbitals Electrons interact and make contributions to E Singlet and triplet states Spin-orbit coupling. Fig 10.18 Vector model for paired-spin electrons.

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Atomic Emission Spectra

Atomic Emission Spectra. Zumdahl 2 : p. 290-299. Atoms. Let go. A range. What is light?. White light: reflection of all colors Black light: absorption of all colors Colors are each a different wavelength (λ: lamda) of light. Colors

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PHY206: Atomic Spectra

PHY206: Atomic Spectra. Lecturer: Dr Stathes Paganis Office: D29, Hicks Building Phone: 222 4352 Email: paganis@NOSPAMmail.cern.ch Text: A. C. Phillips, ‘Intro to QM’. Lectures 9-11: Outline. Identical Particles Particle Exchange Symmetry and its Physical Consequences

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Atomic Structure and Atomic Spectra

Atomic Structure and Atomic Spectra. Chapter 10. Structures of many-electron atoms. Because of electron correlation, no simple analytical expression for orbitals is possible Therefore ψ (r 1 , r 2 , ….) can be expressed as ψ (r 1 ) ψ (r 2 )… Called the orbital approximation

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Atomic Structure and Atomic Spectra

Atomic Structure and Atomic Spectra. Chapter 13. Table 10.1 Hydrogenic radial wavefunctions. R = (N n,l ) (polynomial in r) (decaying exponential in r). L n,l (p) is an associated Laguerre polynomial. Fig 10.4. Potential energy between an electron and proton in a hydrogen atom. +.

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PHY206: Atomic Spectra

PHY206: Atomic Spectra. Lecturer: Dr Stathes Paganis Office: D29, Hicks Building Phone: 222 4352 Email: paganis@NOSPAMmail.cern.ch Text: A. C. Phillips, ‘Introduction to QM’ http://www.shef.ac.uk/physics/teaching/phy206 Marks: Final 70%, Homework 2x10%, Problems Class 10%.

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Atomic Spectra

Atomic Spectra. Lab 1. Light. If we pass light through a prism or diffraction grating, we can see the intensity as a function of wavelength. Type of Spectrum. Solids, liquids, and dense gases emit light of all wavelengths, without any gaps – or a continuous spectrum.

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Atomic Spectra

Atomic Spectra. Rutherford Model - Atom is mostly empty space with all the positive charge concentrated in a tiny massive central core. He also suggested a planetary model where electrons orbit the nucleus. Although a major step forward, this model was flawed.

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Atomic Structure and Atomic Spectra (CH 13)

Atomic Structure and Atomic Spectra (CH 13). A hydrogenic atom is a one-electron atom or ion of general atomic number Z ; H, He + , Li 2+ ,… A many-electron atom is an atom or ion with more than one electron. The SWE can be solved exactly only for hydrogenic atoms.

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ATOMIC SPECTRA

ATOMIC SPECTRA. Objectives 1. Determine the emission spectrum of Hydrogen and other elements. 2. Calculate the expected wavelengths of H using the Rydberg equation. 3. Determine the composition of unknown solutions using flame tests.

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Electromagnetic Radiation, Atomic Structure & Spectra

Electromagnetic Radiation, Atomic Structure & Spectra. “Light” – From gamma-rays to radio waves. The vast majority of information we have about astronomical objects comes from light they either emit or reflect Here, “ light ” stands for all sorts of electromagnetic radiation

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