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Esselman, Brian J.; Hill, Nicholas J. – Journal of Chemical Education, 2015
The electronic and molecular structure of the acylium cation ([CH[subscript 3]CO][superscript +], 1) receives varied treatment in undergraduate textbooks and online resources. The overall structure of 1 is typically represented as an equal combination of resonance structures containing C-O triple and double bonds, the latter structure occasionally…
Descriptors: Investigations, Undergraduate Students, Molecular Structure, Knowledge Representation
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Peterson, Jacob – American Biology Teacher, 2014
A logical question to be expected from students: "How could life develop, that is, change, evolve from simple, primitive organisms into the complex forms existing today, while at the same time there is a generally observed decline and disorganization--the second law of thermodynamics?" The explanations in biology textbooks relied upon by…
Descriptors: Evolution, Scientific Concepts, Biological Sciences, Scientific and Technical Information