Answered: At first glance, we expect the Zeff of…

At first glance, we expect the Zeff of a valence electron of sodium (Z = 11) to be 1 but in reality, it is closer to 2.667 because _____.

Chemistry & Chemical Reactivity

9th Edition

ISBN:9781133949640

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter7: The Structure Of Atoms And Periodic Trends

Section: Chapter Questions

Problem 73SCQ

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Question

At first glance, we expect the Zeff of a valence electron of sodium (Z = 11) to be 1 but in reality, it is closer to 2.667 because _____.

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Use the data given below to construct a Born-Haber cycle to determine the electron affinity of Br. ΔH°(kJ mol-1) K(s) → K(g) 89 K(g) → K⁺(g) + e⁻ 419 Br2(l) → 2Br(g) 193 K(s) + ½Br2(g) → KBr (s) -394 KBr(s) → K⁺(g) + Br⁻(g) 674 A) -885 kJ B) -464 kJ C) +367 kJ D) -325 kJ E) +246 kJ
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