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Atomic Physics Overview and Electron Transitions
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Atomic Physics Overview and Electron Transitions

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@QuietSpessartine

Questions and Answers

What occurs when atoms in a discharge tube jump to their ground state?

  • They emit only visible light.
  • They absorb radiation from the environment.
  • They emit no radiation.
  • They emit multiple forms of radiation. (correct)

    • How is the radiation spectrum obtained in the experiment described?

  • By blocking all other forms of radiation.
  • By reflecting emitted light onto a fluorescing screen.
  • By allowing emitted radiations to pass through a spectrometer. (correct)
  • By using a light source to illuminate a filter.

    • What role do excited states play in the emission of radiation from atoms in the tube?

  • They lead to the emission of radiation during de-excitation. (correct)
  • They decrease the intensity of emitted light.
  • They are necessary for energy absorption.
  • They cause the atom to disintegrate.

    • What is depicted on the fluorescent screen during the experiment?

    <p>The spectrum of emitted radiations.</p> Signup and view all the answers

    What is indicated by the infinite number of atoms in the discharge tube?

    <p>Variability in emitted radiation.</p> Signup and view all the answers

    What measurement unit is suggested for certain wavelengths observed in the radiation spectrum?

    <p>Ångströms (A)</p> Signup and view all the answers

    What year was the first edition of the book published?

    <p>2000</p> Signup and view all the answers

    Which company is responsible for the typesetting of the book?

    <p>CL Media DTP Unit</p> Signup and view all the answers

    What is the ISBN of the book?

    <p>978-93-87444-70-6</p> Signup and view all the answers

    Which of the following is true regarding reproduction of the book?

    <p>No part may be reproduced without written permission.</p> Signup and view all the answers

    Where is CL Media (P) Ltd. located?

    <p>New Delhi</p> Signup and view all the answers

    What is the email contact for product information?

    <p><a href="mailto:[email protected]">[email protected]</a></p> Signup and view all the answers

    The book is dedicated to which individuals?

    <p>My Parents, Son, Daughter</p> Signup and view all the answers

    Which of the following statements is correct regarding the administrative offices?

    <p>They are located in Mohan Cooperative Industrial Area.</p> Signup and view all the answers

    What is the energy of an electron in the ground state of a hydrogen-like atom?

    <p>$-13.6 Z^2 eV$</p> Signup and view all the answers

    What series consists of wavelengths emitted when an electron jumps to the n=4 orbit?

    <p>Brackett Series</p> Signup and view all the answers

    Which of the following series includes transitions to the n=5 orbit?

    <p>Pfund Series</p> Signup and view all the answers

    Which series emits wavelengths in the Deep Infra Red region?

    <p>Pfund Series</p> Signup and view all the answers

    What is the first member wavelength of the Balmer series in the hydrogen spectrum?

    <p>6563 A</p> Signup and view all the answers

    The ionization energy of a hydrogen-like atom is equal to what value?

    <p>$13.6 Z^2 eV$</p> Signup and view all the answers

    Electrons of which energy can cause emitted radiation from hydrogen atoms?

    <p>$0.20 eV$ and $12.09 eV$</p> Signup and view all the answers

    What orbital transition produces the first line of the Brackett series?

    <p>n=5 to n=4</p> Signup and view all the answers

    What does an electron emit when it transitions from a higher to a lower energy state in a hydrogenic atom?

    <p>Photon</p> Signup and view all the answers

    Which spectral series corresponds to the transitions of hydrogen electron emitting wavelengths in the ultraviolet region?

    <p>Lyman series</p> Signup and view all the answers

    In a hydrogenic atom, how many different ways can an electron transition from the nth state to the ground state?

    <p>C2</p> Signup and view all the answers

    What is observed in the hydrogen spectrum that indicates the presence of different transitions?

    <p>Group of lines with blank bands</p> Signup and view all the answers

    What occurs to an electron in a gas containing several hydrogen atoms/ions when they are excited to the nth state?

    <p>They can transition in various ways to the ground state over time</p> Signup and view all the answers

    Which of the following series is NOT a spectral series of the hydrogen atom?

    <p>Kalpha series</p> Signup and view all the answers

    What is the primary focus of the chapter discussed?

    <p>Experimental evidence supporting atomic structure</p> Signup and view all the answers

    Why is experimental evidence crucial in understanding atomic structures?

    <p>It provides tangible confirmation of abstract concepts</p> Signup and view all the answers

    Which aspect of atomic physics is highlighted as lacking in student knowledge?

    <p>Common experiments related to atoms</p> Signup and view all the answers

    What is one fundamental fact likely explained in this chapter?

    <p>The Rutherford model of the atom</p> Signup and view all the answers

    What element of atomic physics is addressed regarding student misconceptions?

    <p>The existence of atomic nuclei</p> Signup and view all the answers

    Which of the following would be a significant reason for studying atomic physics in detail?

    <p>To understand the foundational structures of matter</p> Signup and view all the answers

    What could be considered a preceding topic before discussing atomic structures?

    <p>The early models of matter</p> Signup and view all the answers

    What type of knowledge is primarily associated with this chapter?

    <p>Empirical data from experiments</p> Signup and view all the answers

    Study Notes

    Editions and Publication Information

    • First Edition released in 2000, with revised editions in 2017 and 2019-20.
    • Published by CL Media (P) Ltd., located in New Delhi, India.
    • ISBN for the book: 978-93-87444-70-6.
    • Product information available at www.gkpublications.com.

    Atomic Physics Overview

    • Focuses on experimental evidence supporting atomic theory.
    • Discusses fundamental facts regarding atomic structures.
    • Explores principles of atomic transitions and emissions.

    Electron Transitions and Spectral Series

    • Electrons transition from excited states to lower energy states, emitting radiation.
    • The emitted spectral lines correspond to specific wavelengths, observable in discharge tubes.
    • The hydrogen spectral lines are divided into several series:
      • Lyman Series: Transitions to n=1.
      • Balmer Series: Transitions to n=2.
      • Paschen Series: Transitions to n=3.
      • Brackett Series: Emission from n to n=4 orbits, lies in the Infrared region.
      • Pfund Series: Emission from n to n=5 orbits, lies in the Deep Infrared region.

    Energy and Ionization in Hydrogen-like Atoms

    • Energy of electrons in the ground state of a hydrogen-like atom is given by:
      • ( E = -13.6 \frac{Z^2}{n^2} ) eV, where Z is the atomic number.
    • Ionization energy is equal in magnitude to the energy of the ground state.

    Calculating Wavelengths of Emission

    • Wavelengths can be determined for transitions between energy levels.
    • Electrons with energies of 10.20 eV and 12.09 eV can cause radiation emissions in hydrogen.
    • Example: The first line of the Balmer series corresponds to a wavelength of 6563 Å.

    Experimental Evidence and Spectra

    • Experiments demonstrate the existence and structure of atoms.
    • Observations of spectral lines provide insights into atomic behavior and energy levels.
    • The blank bands in the spectral lines indicate energy levels where no transitions occur, deepening understanding of atomic structure.

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    Quiz Team

    Description

    This quiz covers the principles of atomic physics with a focus on experimental evidence for atomic theory. It also delves into electron transitions and the spectral series, including discussions on Lyman, Balmer, Paschen, and Brackett series. Test your knowledge on the topics and concepts related to atomic structure and emissions.

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