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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.
Probing the Orbital Energy of an Electron in an AtomJames L. Bills This article answers an appeal for simple theoretical interpretations of atomic properties. A theoretical snapshot of an atom, showing the screened nuclear charge and the electron to be ionized at its radius of zero kinetic energy, enables anyone to approximate its ionization energy. Bills, James L. J. Chem. Educ.2006, 83, 473.
Atomic Properties / Structure |
Main-Group Elements |
Periodicity / Periodic Table |
Physical Properties |
Quantum Chemistry |
Theoretical Chemistry
The Place of Zinc, Cadmium, and Mercury in the Periodic TableWilliam B. Jensen Explanation for why the zinc group belongs with the main group elements; includes several versions of periodic tables. Jensen, William B. J. Chem. Educ.2003, 80, 952.
Periodicity / Periodic Table |
Main-Group Elements |
Transition Elements |
Descriptive Chemistry |
Atomic Properties / Structure
Ionization Energies of Atoms and Atomic IonsPeter F. Lang and Barry C. Smith Explanations for the apparently irregular first and second ionization energies of transition and inner transition elements. Lang, Peter F.; Smith, Barry C. J. Chem. Educ.2003, 80, 938.
