Workshop 6: Introduction to Spectroscopy Spectroscopy is the study of how matter

Question

Workshop 6: Introduction to Spectroscopy Spectroscopy is the study of how matter interacts with electromagnetic (EM) radiation. Neon lights are a direct application of spectroscopy. Electrons inside the atoms of a noble gas are ap ts excited to higher energy orbitals and when they relax back to the ground state the gas emi photons in a characteristic and specific color. In today's workshop, we will explore and compare the visible emission spectra of sodium and mercury, and then in part 2, we practice using the ydberg equation to do some energy level calculations for an unknown one electron species. We already know that the light emitted from atoms is due to the relaxation of specific electron(s) from excited states back down to lower energy levels and we know how calculate the energy of individual levels and energy gaps. Now let's think about what happens to the size of the atoms when this process occurs PREDICT 1: Do you expect that the size of an atom (its atomic radius) to increase or decrease when it absorbs a photon and electrons are excited to higher energy levels? EXPLAIN PREDICT 2: Do you expect that the size of an atom (its atomic radius) to increase or decrea when its excited electrons relax back down to lower energy levels? EXPLAIN Now certify: Can all members answer these questions independently: all members sign below and th move on to solving the problems

Explanation / Answer

Predict 1 As size of atom will increase when it absorbs photon as it occupy orbit and electron are at higher energy level and larger orbit are at higher energy level.

Predict 2   As size of atom will decrease when the excited electrons relax back down to lower energy level as it does not able to occupy orbit and electron are at lower energy level .

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