userdata-paziras-Chem101-Chap_09A

2p6 2shells some interelectron repulsio ns o 8p 9e

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Unformatted text preview: tion · Reason: Larger positive ionic charge means fewer electrons 13 Chemistry 101 Chapter 9 Size of Cations in The Periodic Table (Main Group Elements) IA 2 IIA IIIA + Li (isoelectronic with He) 3 Na+ 11 protons 4 + K Ca 2+ 19 protons 20 protons Ga3+ (isoelectronic with Ar) 5 2+ Rb + Sr 37 protons 38 protons 3+ In (isoelectronic with Kr) Cs + 55 protons Tl 3+ (isoelectronic with Xe) 6 Mg 2+ Al 3+ 12 protons 13 protons Ba2+ 56 protons 14 (isoelectronic with Ne) Chemistry 101 Chapter 9 RADII OF ANIONS < Radii of Atoms Radii of Anions Cl 0 2 1s 2s2 2p 3s2 3p 6 5 Cl - 1s2 2s2 2p 3s2 3p 6 6 3 shells 17 p , 17 e Nuclear Charge= + 17 Holds 17 electrons strongly isoelectronic with Ne 3 shells 17p, 18 e Nuclear Charge = + 17 Holds 1...
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This document was uploaded on 03/18/2014 for the course CHEM 101 at Los Angeles Mission College.

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