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Get Full Access to Atkins' Physical Chemistry - 11 Edition - Chapter 13c - Problem P13c.7
Get Full Access to Atkins' Physical Chemistry - 11 Edition - Chapter 13c - Problem P13c.7

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ISBN: 9780198769866 2042

## Solution for problem P13C.7 Chapter 13C

Atkins' Physical Chemistry | 11th Edition

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Atkins' Physical Chemistry | 11th Edition

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Problem P13C.7

The NO molecule has a doubly degenerate excited electronic level $$121.1 \mathrm{~cm}^{-1}$$ above the doubly degenerate electronic ground term. Calculate and plot the electronic partition function of NO from T=0 to 1000 K. Evaluate

(a) the populations of the levels and

(b) the mean electronic energy at 300 K.

Text Transcription:

121.1 cm^-1

Step-by-Step Solution:
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CHAPTER 8. Periodic Relationships Among Elements  Looking at Periodic Table o Ground-state electron configuration: ns1 , ns2 , 2 1 ns np , …etc. o Classification:  G1, G2, G13-G17: Representative elements  Transition metals  Last transition metal group: Zinc, Cadmium, Mercury  Noble Gases  Lanthanides & Actinides o Atoms gain or lose electrons to have a noble-gas outer electron configuration 1 +¿  Na: [Ne]3 s = Na¿ : [Ne] 2 2+¿  Ca: [AR] 4s = Ca¿ : [Ar] o Cations & Anions of Representative Elements  G1: +1  G2: +2  G13: +3  G15: -3  G16: -2  G17: -1  Isoelectronic: having the same number of electrons, hence the same ground-state electron configuration  When a cation is formed from an atom of a transition metal, electrons are always removed first from the ns orbital & then from the (n-1)d orbitals 2 6 o Fe: [Ar] 4s 3d 2+¿ 0 6 5 o Fe¿ : [Ar] 4s 3d or [Ar] 3d Z  effective nuclear charge ( eff): the “positive charge” felt by an electron

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