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Nonmetals, Metals, and “In-Betweens”

       Main Group Appellations

       d-Block Metal Appellations

       Other Appellations

       Commentary

       References

       Chapter 6Isoelectronicity

       Historical Definitions of Isoelectronic

       Modern Definitions of Isoelectronic

       Isoelectronicity: The Future

       Commentary

       References

       Chapter 7Group and Period Patterns among the Main Group Elements

       Main Group Elements

       Group Trends

       Group 1 (Alkali Metals)

       Group 2 (Alkaline Earth Metals)

       Group 13 (Triels)

       Group 14 (Tetrels)

       Group 15 (Pnictogens)

       Group 16 (Chalcogens)

       Group 17 (Halogens)

       Group 18 (Aerogens)

       Periodic Trends

       Commentary

       References

       Chapter 8Patterns among the Transition Metals

       What Is a Transition Metal?

       Previous Classifications of Transition Metals

       Categorizations of the Transition Metals

       Categorizing the Early 4d–5d Elements

       The Platinum Metals

       Is There, in Fact, a Group 11?

       A Hybrid Solution

       Commentary

       References

       Chapter 9Group (n) and Group (n + 10) Relationships

       Going Back to the Past

       Definition of the Group (n) and Group (n + 10) Relationship

       Group 3 and Group 13

       Group 4 and Group 14

       Group 5 and Group 15

       Group 6 and Group 16

       Group 7 and Group 17

       Group 8 and Group 18

       Group 1 and Group 11

       Group 2 and Group 12

       A Curious (n + 5) and (n + 10) Case

       Commentary

       References

       Chapter 10Chemical “Knight’s Move” Relationship

       The Group (n)/Period (m) and Group (n + 2)/Period (m + 1) Linkages

       Laing’s Knight’s Move (K-M) Claims

       Reevaluation of the Knight’s Move Relationship

       Knight’s Move Relationships among “Double Pairs”

       The Knight’s Move Relationship and the “Inert Pair” Effect

       Commentary

       References

       Chapter 11Isodiagonality

       Isodiagonality

       Explanations for Isodiagonality

       Isodiagonality of Lithium and Magnesium

       Isodiagonality of Beryllium and Aluminum

       Isodiagonality of Boron and Silicon

       Isodiagonality of Carbon and Phosphorus

       Isodiagonality of Nitrogen and Sulfur

       Isodiagonality of Vanadium and Molybdenum

       Isodiagonality of Tellurium and Astatine

       Evidence-Based Isodiagonality

       Commentary

       References

       Chapter 12Lanthanoids, Group 3, and Their Connections

       Yttrium and Scandium

       The 4f Elements

       The Lanthanoids

       Ion Charges of the Lanthanoids

       Restructuring the Lanthanoids

       External Lanthanoid Relationships

       Commentary

       References

       Chapter 13Actinoid and Post-Actinoid Elements

       The Actinoid Elements

       Oxidation States of the Actinoids

       Post-Actinoid Elements

       And Beyond …

       Commentary

       References

       Chapter 14Pseudo-Elements

       Pseudo-Elements

       Pseudo-Halogens

       Combo Elements

       Superatoms

       Synthetic Metals

       Commentary

       References

       Index

       Introduction

      “Periodic Properties? That’s easy! Properties down a couple of Groups, properties across a sample Period, done!” A not uncommon view. Yet there is a richness of relationships, some obvious, some not, which makes an in-depth look at the chemical elements a rewarding adventure. Ronald Rich eloquently described the lure of periodicity in all its

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