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Discovery VideosLyubov Hoffman Laroche, Gary Wulfsberg, Barbara Young The use of digital video for instruction has many advantages. In many situations the only way to present some chemical phenomena is through the use of video. The two video lessons presented here are examples intended to supplement our article in the August 2003 issue of JCE.
The Periodic Table: Facts or Committees?William B. Jensen I would like to offer two observations relative to the recent letter of Clark and White on the representation of the f-block elements in the periodic table that relate to some disturbing trends in the attitudes of the chemical community towards the nature and use of the periodic tableattitudes that are implicit, though perhaps not intentionally so, in their letter. Jensen, William B. J. Chem. Educ.2008, 85, 1491.
Periodicity / Periodic Table
Response to "The Flyleaf Periodic Table"Laurence Lavelle Clark and White wonder why the chemistry education community has not uniformly adopted just one form of the periodic table. Part of the answer is that the majority who are silent on this issue do not want to be attacked by the vocal proponents who insist that lanthanum and actinium must be in the f-block and lutetium and lawrencium must be in the d-block. Lavelle, Laurence. J. Chem. Educ.2008, 85, 1491.
Periodicity / Periodic Table
The Flyleaf Table: An AlternativePhilip J. Stewart In their consideration of three ways of treating the f-block elements in the standard periodic table, Clark and White opt to footnote a set 15-elements-wide, including both La and Lu, Ac, and Lr. Their only grounds seem to be that this is what IUPAC chose in 2005, but that decision sounds like an attempt to please everyone, which in the end will please no one. Stewart, Philip J. J. Chem. Educ.2008, 85, 1490.
Groups of Related ElementsEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Periodicity / Periodic Table
Periodic Variation of IE and EAEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Periodicity / Periodic Table
Ionization EnergiesEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
