The chemical equation tool uses curly brackets (braces) to produce nuclear chemistry equations.
For example:
{238,92} U
will be formatted as
It is important to note that the chemical equation tool does NOT check the validity of the mass numbers and atomic numbers. That is up to you. It does, however, give you a quick and easy way to produce the equations.
Neutrons, protons and electrons can be entered as follows:
{1,0} n {1,1}p {0,-1}e
The curly brackets can be used in a neat trick