There are the following files:
A guide to, and statistics/highlights of, the
data. READ THIS FIRST
The data files themselves:
periodic_table.html,
an html file suitable for viewing onscreen,
periodic_table,
a UNIX text file suitable for download,
periodic_table.txt,
a DOS text file suitable for download.
periodic_table-long.html,
an html file suitable for viewing onscreen,
periodic_table-long,
a UNIX text file suitable for download,
periodic_table-long.txt,
a DOS text file suitable for download.
(With my operating system and browser, periodic_table and
periodic_table-long are both suitable for viewing onscreen. But since
not all browsers handle files the same way, I am including the html
versions just in case.)