A selenium se se 2 ar 3d 10 4s 2 4p 6 ns 2 np 6

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a. selenium, Se Se 2 [Ar] 3d 10 4s 2 4p 6 ns 2 np 6 configuration is stable. b. yttrium, Y Y 3+ [Kr] or [Ar] 3d 10 4s 2 4p 6 ns 2 np 6 configuration is stable. c. thallium, Tl Tl + [Xe] 4f 14 5d 10 6s 2 nd 10 (n+1)s 2 configuration is stable. Tl 3+ [Xe] 4f 14 5d 10 nd 10 configuration is stable. Exercise 7.5 – Effective Charge: What is the effective charge on the highest energy electrons of each of the following? a. Na +1 b. Al +3 c. Sc +2 d. Ni +2 Exercise 7.6 – Atomic Size and Ionization Energy: Complete the following table by writing the symbol for the element in each pair that has the largest atomic size and the highest ionization energy. If they are about the same, write "neither". Largest atomic size Highest ionization energy S or Se Se S C or F C F Ni or Pt Pt Ni Mn or Co neither neither Copyright 2004 Mark Bishop
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Chapter 7 Exercise Key 3 Exercise 7.7 – Electron Affinity: Circle the symbol in each pair that represents the element that has the most favorable electron affinity. a. Cl or I b. C or F Exercise 7.8 – Isoelectronic Series: Write the formulas for three cations and three anions that are isoelectric with krypton and arrange them in the order of increasing ionic size. Y 3+ < Sr 2+ < Rb + < Kr < Br < Se 2 < As 3 Copyright 2004 Mark Bishop
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  • Fall '06
  • Mark
  • Atom, Electron, Electric charge, Ion, Monatomic ion, ABBREVIATED ELECTRON CONFIGURATIONS

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