Atomic Spectroscopy Hand Written Note

Here, We provided to Atomic Spectroscopy Hand Written Note. Spectroscopy means the dispersion of light into component colors. In simple words, it is a method to measure how much light is absorbed by a chemical substance and at what intensity of light passes through it. As per analytical science, every element or compound has a unique characteristic spectrum. Each compound absorbs and disperses light over a certain range of wavelengths. Free download PDF Atomic Spectroscopy Hand Written Note.

atomic spectroscopy hand written noteElectromagnetic radiation is the continuous spectrum of energy-bearing waves ranging from extremely short waves, such as high-energy X-rays (with wavelengths of about 10 nanometres [nm]), to very long, low-energy waves such as radio waves (with wavelengths of one meter [m] or more). Visible light, for example, is the range of electromagnetic radiation detectable by human vision, with wavelengths of roughly 400 to 700 nm. Objects appear colored when they absorb visible light of certain wavelengths, and those absorbed wavelengths are consequently absent from light that passes from the colored object to the eyes. Free download PDF Atomic Spectroscopy Hand Written Note.

Molecules are able to absorb light of certain wavelengths because the energy content of the absorbed light is the precise value needed to cause a molecule to be excited from one energy state to a higher one. The myriad energy levels in a molecule are said to be quantized because each one differs from another by a discrete, measurable energy value, just as each step in a stairway is a fixed height above, or below, all others. Thus, by measuring the wavelengths of the electromagnetic radiation absorbed by a molecule, it is possible to gain information about the various energy levels within it. Free download PDF Atomic Spectroscopy Hand Written Note.

This information can then be correlated with specific details of molecular structure. Instruments called spectrometers measure the wavelengths of light that are absorbed by molecules in various regions of the electromagnetic spectrum. The most important spectroscopic techniques for structure determination are ultraviolet and visible spectroscopy, infrared spectroscopy, and nuclear magnetic resonance spectroscopy. A fourth technique, termed mass spectrometry, does not depend on the absorption of electromagnetic radiation, but it is valuable for the information it provides about the number and type of atoms present in a molecule. The following sections briefly describe the various applications of these techniques for organic compounds; for more information, see spectroscopy. Free download PDF Atomic Spectroscopy Hand Written Note.

Types of Spectroscopy:

  • Acoustic resonance
  • Time-resolved
  • Photoemission
  • X-ray photoelectron
  • Circular Dichroism
  • IR Spectroscopy (Infrared spectroscopy)
  • Raman spectroscopy




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Atomic spectroscopy is the study of the electromagnetic radiation absorbed and emitted by atoms. Since unique elements have characteristic (signature) spectra, atomic spectroscopy, specifically the electromagnetic spectrum or mass spectrum, is applied for the determination of elemental compositions. Atomic Spectroscopy Hand Written Note.
It can be divided by atomization source or by the type of spectroscopy used. In the latter case, the main division is between optical and mass spectrometry. Mass spectrometry generally gives a significantly better analytical performance but is also significantly more complex. Atomic Spectroscopy Hand Written Note.

This complexity translates into higher purchase costs, higher operational costs, more operator training, and a greater number of components that can potentially fail. Because optical spectroscopy is often less expensive and has performance adequate for many tasks, it is far more common[citation needed] Atomic absorption spectrometers are one of the most commonly sold and used analytical devices.

Atomic Spectroscopy:

Atomic spectroscopy is the study of the electromagnetic radiation absorbed or emitted by the atoms. There are three types of atomic spectroscopy and they are:

  • Atomic emission spectroscopy: This involves the transfer of energy from the ground state to an excited state. The electronic transition can be explained in atomic emission.
  • Atomic absorption spectroscopy: For absorption to take place there should be identical energy difference between the lower and higher energy levels. The atomic absorption spectroscopy principle uses the fact that the free electrons generated in an atomizer can absorb radiation at a specific frequency. It quantifies the absorption of ground-state atoms in the gaseous state.
  • Atomic fluorescence spectroscopy: This is a combination of atomic emission and atomic absorption as it involves radiation of both excitation and de-excitation.

Uses of Atomic Spectroscopy:

  • It is used for identifying the spectral lines of materials used in metallurgy.
  • It is used in pharmaceutical industries to find the traces of materials used.
  • It can be used to study multidimensional elements.


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