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Paramagnetism: Compounds Vials of a number of compounds (NaCl, MnSO4, FeSO4, CoCl2, NiSO4, ZnSO4, K4Fe(CN)6, [Co(NH3)6]Cl3, [Ni(NH3)6]Cl2, and H2O) are hung from a thread. When a magnet is brought near, some of the vials are attracted.
Magnetic Properties |
Atomic Properties / Structure
Paramagnetism: Oxidation States of Manganese Manganese(III) oxide, with 4 unpaired electrons per Mn atom, is more strongly attracted to a magnet than is manganese(IV) oxide, with only 3 unpaired electrons per Mn atom. Potassium permanganate, a compound of Mn(VII), has no unpaired electrons and is not attracted to a magnet.
Six Pillars of Organic ChemistryJoseph J. Mullins This article focuses on a core set of conceptselectronegativity, polar covalent bonding, inductive and steric effects, resonance, and aromaticitythe proper application of which can explain and predict a wide variety of chemical, physical, and biological properties of molecules and conceptually unite important features of general, organic, and biochemistry. Mullins, Joseph J. J. Chem. Educ.2008, 85, 83.
Bioorganic Chemistry |
Covalent Bonding |
Hydrogen Bonding |
Mechanisms of Reactions |
Periodicity / Periodic Table |
Reactive Intermediates |
Resonance Theory
Relativistic Effects and the Chemistry of the Heaviest Main-Group ElementsJohn S. Thayer The heaviest main-group elements often show markedly different chemical properties than their lighter counterparts. Most of these differences arise from changes in the relative energies of the outer-shell atomic orbitals that can be explained by application of Einstein's theory of special relativity to electrons in atoms. Thayer, John S. J. Chem. Educ.2005, 82, 1721.
Main-Group Elements |
Atomic Properties / Structure |
Metals |
Organometallics |
Periodicity / Periodic Table
Boiling Point versus MassMichael Laing I am very pleased that Ronald Rich has written making these comments, because he is pre-eminent in this field, beginning with his early book, Periodic Correlations. Laing, Michael. J. Chem. Educ.2004, 81, 642.
The Amount of Substance: MolesEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
