Differbetween
Whereas atomic spectra involve only electronic transitions, the spectroscopy of molecules is more intricate because vibrational and rotational degrees of freedom come into play as well. ... This has provided a rich source of information on molecular geometry, energetics and dynamics.
- What is the difference between atomic and molecular spectroscopy?
- What is molecular spectroscopy?
- What is the difference between an atomic absorption and a molecular absorption spectrum and why does this difference exist?
- What is molecular spectroscopy used for?
- What is the basic principle of spectroscopy?
- What is the basic principle of atomic absorption spectroscopy?
- What are the three types of spectra?
- What are the two types of spectra?
- What are the types of molecular spectroscopy?
- What is meant by atomic spectra?
- Why are atomic absorption lines so sharp?
- What is AAS in chemistry?
What is the difference between atomic and molecular spectroscopy?
Re: Difference Between Atomic or Molecular Spectroscopy
They are affected by interactions of the transitioning electrons with the nuclei spins and with the other electrons in the atom. Molecular spectra involve transitions in molecules with two or more atoms (either the same or different).
What is molecular spectroscopy?
Molecular spectroscopy involves the interaction of electromagnetic radiation with materials in order to produce an absorption pattern (i.e. a spectrum) from which structural or compositional information can be deduced.
What is the difference between an atomic absorption and a molecular absorption spectrum and why does this difference exist?
Answer: It's the energy level. With spectroscopy you are measuring how energy is absorbed, emitted, and or reflected. In molecular spectroscopy you are looking at interactions with bonding electrons in the outer valence shell. ... in atomic spectroscopy you are looking for interactions that are independent of bonds.
What is molecular spectroscopy used for?
Spectroscopy is used in physical and analytical chemistry because atoms and molecules have unique spectra. As a result, these spectra can be used to detect, identify and quantify information about the atoms and molecules. Spectroscopy is also used in astronomy and remote sensing on Earth.
What is the basic principle of spectroscopy?
The term "spectroscopy" defines a large number of techniques that use radiation to obtain information on the structure and properties of matter. The basic principle shared by all spectroscopic techniques is to shine a beam of electromagnetic radiation onto a sample, and observe how it responds to such a stimulus.
What is the basic principle of atomic absorption spectroscopy?
Atomic absorption spectroscopy (AAS) is based upon the principle that free atoms in the ground state can absorb light of a certain wavelength. Absorption for each element is specific, no other elements absorb this wavelength.
What are the three types of spectra?
There are three general types of spectra: continuous, emission, and absorption.
What are the two types of spectra?
When electromagnetic radiation is passed through a prism or grating it is split up and forms a collection of lines representing different wavelengths. This is called spectrum. The spectra can be divided into two types viz., emission and absorption spectra.
What are the types of molecular spectroscopy?
There are three basic types of spectrometer systems that are commonly used for molecular spectroscopy: emission, monochromatic radiation absorption, and Fourier transform. Each of these methods involves a source of radiation, a sample, and a device for detecting and analyzing radiation.
What is meant by atomic spectra?
When atoms are excited they emit light of certain wavelengths which correspond to different colors. The emitted light can be observed as a series of colored lines with dark spaces in between; this series of colored lines is called a line or atomic spectra. Each element produces a unique set of spectral lines.
Why are atomic absorption lines so sharp?
Atomic absorption lines very sharp with an inherent linewidth of 0.0001 nm. Due to Doppler effect and pressure broadening, linewidths of atoms in a flame are typically 0.001 - 0.01 nm. Therefore, we require a source having a linewidth of less than 0.01 nm.
What is AAS in chemistry?
Atomic absorption spectrometry (AAS) is an analytical technique that measures the concentrations of elements. Atomic absorption is so sensitive that it can measure down to parts per billion of a gram (µg dm–3) in a sample. The technique makes use of the wavelengths of light specifically absorbed by an element.
