Great article-very interesting and informative. There is however an error that I would like to see corrected. The articles states "its atomic mass (the number of protons plus neutrons)". The number of protons plus neutrons is the 'mass number'; the mass of a single atom express in atomic mass units is the 'atomic mass'; the average of the atomic masses of the naturally occurring isotopes of an element is the 'average atomic mass' or the 'atomic weight'. The distinction between mass number, atomic mass, and atomic weight has tripped up many chemistry students.
posted by Jim Mehls
January 5, 2013
JSTOR, the online academic archive, contains complete back issues of American Scientist from 1913 (known then as the Sigma Xi Quarterly) through 2005.
The table of contents for each issue is freely available to all users; those with institutional access can read each complete issue.
View the full collection here.
An early peek at each new issue, with descriptions of feature articles, columns, and more. Every other issue contains links to everything in the latest issue's table of contents.
News of book reviews published in
and around the web, as well as other noteworthy happenings in the world of science books.
To sign up for automatic emails of the
American Scientist Update
issues, create an
, then sign up in the
My AmSci area