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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?
The History of Element 43—TechnetiumRoberto Zingales The author is grateful for additional information that allowed him to correct an earlier mistake. Zingales, Roberto. J. Chem. Educ.2006, 83, 213.
Isotopes |
Nuclear / Radiochemistry |
Periodicity / Periodic Table
The History of Element 43—TechnetiumFathi Habashi The article From Masurium to Trinacrium: The Troubled Story of Element 43 is the best story so far published about the history of technetium. There is, however, one paragraph on the right column of page 226 that is questionable. Habashi, Fathi. J. Chem. Educ.2006, 83, 213.
Isotopes |
Nuclear / Radiochemistry |
Periodicity / Periodic Table
The History of Element 43—TechnetiumFathi Habashi The article From Masurium to Trinacrium: The Troubled Story of Element 43 is the best story so far published about the history of technetium. There is, however, one paragraph on the right column of page 226 that is questionable. Habashi, Fathi. J. Chem. Educ.2006, 83, 213.
ACS Scholars Program ACS awards renewable scholarships to underrepresented minority students who want to enter the fields of chemistry or chemistry-related fields. Awards of up to $5,000 are given to qualified applicants based on academic standing, financial need, career objective, leadership skills, and involvement in school activities and community service
Student / Career Counseling |
Minorities in Chemistry
College Planning This Web page lists resources to help make an informed decision about studying a chemical science.
Student / Career Counseling
Find ACS-Approved Programs This Web page lists resources to help make an informed decision about studying a chemical science.
The Amount of Substance: MolesEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
