Issue Date: Apr 15, 1995
I read the article, Elementary order (Down To Earth, January 15, 1995), in which certain facts have not been presented properly.
The Periodic Table is the long form, also called the Modern Periodic Table and not the Mendeleev (and certainly not the Medekeyev) Periodic table, and is incompelete without numbering the columns in it. There is mention of the Modern Periodic Table in the text. The accepted IUPAC recommendation says that 18 columns be numbered from 1 to 18 and the earlier notataion of 1a, 1b, IIa, IIb, etc, be given up.