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Hedi Zappacosta 1E
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Joined: Fri Sep 28, 2018 12:27 am


Postby Hedi Zappacosta 1E » Wed Oct 24, 2018 4:16 pm

What is the difference between atomic and molecular spectroscopy?

Sona Hakobyan 3J
Posts: 45
Joined: Fri Sep 28, 2018 12:25 am

Re: spectroscopy

Postby Sona Hakobyan 3J » Wed Oct 24, 2018 5:13 pm

This describes it in depth:

"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. The interactions change according to the structure and composition of a molecule. Because these electrons are far from the nuclei it takes a relatively small amount of energy to excite them. Some examples of this are IR, NIR, MIR, Raman and NMR Spectroscopy.

in atomic spectroscopy you are looking for interactions that are independent of bonds. Three main paths come to mind; breaking the bonds and ionizing the atoms (AA or ICP-OES/MS), using high energy x-rays to excite the tightly held inner electrons (XRF, SEM), or bombardment with neutrons and measuring the radioactive decay (RNAA). These three methods all require much higher energy sources."

https://www.quora.com/How-do-molecular- ... opy-differ

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