nuc.sty is provided by Neal Davis (davis68@illinois.edu). This package provides automatic notation for nuclear isotopes. Isotopes which have Z with more digits than A require special spacing to appear properly. nuc.sty is released under the LaTeX Project Public License. This is an early draft (v.0.1) of this package. It is invoked in the usual way, \usepackage{nuc} and each element and isotope is indicated by \(element name){(element weight)}. For instance, \Pa{231} \O{18} \H{3} It appears that under certain circumstances, \protect may be required prior to invoking the element (i.e., \protect\U{235}). This package does not currently support omission of the atomic number subscript, although that is planned for the next version.