Personally, I would call a polyatomic molecule only inelastic if its vibrations (or electrons) were excited, but as I say, this is debatable.    From Wordnik.com.  [Citizendium, the Citizens' Compendium - Recent changes [en]] Reference

The detailed physics of rotating polyatomic molecules with spin is extremely complex.    From Wordnik.com.  [Richard E. Smalley - Autobiography] Reference

Any polyatomic molecules of interest in combustion would completely decompose even at much lower temperatures.    From Wordnik.com.  [John B. Fenn - Autobiography] Reference

With AP2 we quickly succeeded in setting the world's record for rotational cooling of a polyatomic molecule (0.17 K).    From Wordnik.com.  [Richard E. Smalley - Autobiography] Reference

Medicines Control Council for approval to carry out legitimate tests on the controversial procedure, known as oxytherapy, or polyatomic apheresis.    From Wordnik.com.  [ANC Daily News Briefing] Reference

Now we could study at least small polyatomic molecules with at the same penetrating level of detail previously attained only for atoms and diatomics.    From Wordnik.com.  [Richard E. Smalley - Autobiography] Reference

He and his associates have determined the structures of a large number of diatomic and polyatomic molecules, including the structures of many free radicals difficult to determine in any other way (among others, those of free methyl and methylene).    From Wordnik.com.  [Gerhard Herzberg - Biography] Reference

Following up on chriscolose's response: in dense gases you get "collision-induced absorption" - a pair of molecules can absorb a photon while they are close enough to be exerting forces on each other you can think of the two colliding diatomic molecules as forming a very short lived polyatomic molecule.    From Wordnik.com.  [Rabett Run] Reference

Chemistry question (mult. choice) about polyatomic ions?.    From Wordnik.com.  [Yahoo! Answers: Latest Questions] Reference

In What ways are polyatomic ions like simple ions? in what ways are they different??.    From Wordnik.com.  [Yahoo! Answers: Latest Questions] Reference

For diatomic and polyatomic molecules the term is debatable, because collisions can excite rotations.    From Wordnik.com.  [Citizendium, the Citizens' Compendium - Recent changes [en]] Reference

I entered into the intro the fact that a gas consisting of polyatomic molecules may be ideal, in contrast to what our influential competitors have to say about it.    From Wordnik.com.  [Citizendium, the Citizens' Compendium - Recent changes [en]] Reference

Ref. point particles without internal structure, but may consist of polyatomic molecules with internal rotational, vibrational, and electronic centers of mass of the molecules and, indeed, mass centers may be seen as structureless point masses.    From Wordnik.com.  [Citizendium, the Citizens' Compendium - Recent changes [en]] Reference

Although rotations are seen as external motions, one could argue that a collision exciting a rotation is inelastic and hence a polyatomic molecule could be seen as an inelastic particle even if it is so rigid that its vibrations are not excited.    From Wordnik.com.  [Citizendium, the Citizens' Compendium - Recent changes [en]] Reference

Ref. point particles without internal structure, but may be formed by polyatomic molecules with internal rotational, vibrational, and electronic centers of mass of the molecules and, indeed, mass centers may be seen as structureless point masses.    From Wordnik.com.  [Citizendium, the Citizens' Compendium - Recent changes [en]] Reference

"contributions to laser isotope separation through advancing the understanding of spectroscopy and coherent excitation of polyatomic molecules.".    From Wordnik.com.  [UT Dallas News Center] Reference

O2 (g) • all halogens: fluorine - F2 (g) chlorine - Cl2 (g) bromine - Br2 (l) iodine - I2 (s) astatine - At2 (s) polyatomic elements include: • • phosphorous - P4 (s) • sulfur - S8 (s) all other nonmetals are monatomic and solid, • except bromine Chemistry 20 - Unit 3 Page 2.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

Man made CO2 may be affecting the climate but the only way to prove that is to show theoretical calculations of the transfer of heat from the Earth's surface (land and sea) directly to the atmosphere by conduction (convection is a mass transfer phenomena), by the evaporation of water (mainly from the oceans), and by the absorption of infra red radiation by polyatomic gasses in the atmosphere and to test the veracity of those calculations with real experiments.    From Wordnik.com.  [WHAT REALLY HAPPENED] Reference

294 interactive hexagonal element pieces (a minimum of one per element, as well as polyatomic ions).    From Wordnik.com.  [Fred's Head from APH] Reference

The charge on a polyatomic ion is caused by.    From Wordnik.com.  [Yahoo! Answers: Latest Questions] Reference

Science How do you balance polyatomic equations?.    From Wordnik.com.  [Answerbag: Latest Questions in Question Categories] Reference

2009) an ideal gas does not necessarily consist of point particles without internal structure but may consist of polyatomic molecules with internal rotational.    From Wordnik.com.  [Citizendium, the Citizens' Compendium - Recent changes [en]] Reference

2009) an ideal gas does not necessarily consist of point particlesw ithout internal structure, but may consist of polyatomic molecules with internal rotational, vibrational, and electronic degrees of freedom.    From Wordnik.com.  [Citizendium, the Citizens' Compendium - Recent changes [en]] Reference

) an ideal gas does not necessarily consist of point particles without internal structure, but may consist of polyatomic molecules with internal rotational, vibrational, and electronic degrees of freedom.    From Wordnik.com.  [Citizendium, the Citizens' Compendium - Recent changes [en]] Reference

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