gElemental is a GTK+ periodic table viewer with detailed information on elements. It is free software released under the GNU General Public License, version 3 or later. libelemental is a C++ data library providing gElemental's data, and is installed with the main program. pyElemental is a Python binding for libelemental, and is available as a separate package. For more information, see <https://github.com/ginggs/gelemental>. Copyright (C) 2016-2021 Graham Inggs <ginggs@riseup.net>. Copyright (C) 2006-2007 Kevin Daughtridge <kevin@kdau.com>. Chemical data are largely derived from the Blue Obelisk Data Repository <http://www.blueobelisk.org/> (see COPYING.DATA for licensing) and from the chemical data compilations on the English Wikipedia <http://en.wikipedia.org/>. Originally derived from GPeriodic version 2.0.8, copyright (C) 2003 Jonas Frantz <jonas.frantz@welho.com> and others.