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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.
An incomplete concept map is shown below, which set of terms for A, B, C and D would result in a correct map based on the concept of wave mechanics applied to a hydrogen atom?
Visualization of electron clouds in atoms and moleculesDouglas, John E. 110. Visualization of the electron orbital concept continues to challenge and intrigue chemical educators. [October and November 1989 Computer Series both inadvertently called number 107. Numbering restored by skipping 109 and calling January 1990 number 110.] Douglas, John E. J. Chem. Educ.1990, 67, 42.
Atomic Properties / Structure |
Molecular Properties / Structure
Is the theoretical emperor really wearing any clothes? Sanderson, R. T. The author asserts that general chemistry material both pushes material of doubtful value and omits material that is useful to many. Sanderson, R. T. J. Chem. Educ.1986, 63, 845.
The Amount of Substance: MolesEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
