Keywords: Taula periòdica.svg Taula periòdica dels elements químics Det periodiske system Periodic table of the chemical elements Tabla periódica de los elementos Alkuaineiden jaksollinen järjestelmä Tavola periodica degli elementi in inglese Periodni sistem elementov Periodic_table svg 50 2012-03-09 15 05 UTC H HIDROGEN Periodic_table svg Cepheus derivative work Arnaugir <span class signature-talk >talk</span> transalted to Catalan Arnaugir Periodic_table svg </nowiki> Uploaded with derivativeFX SVG periodic table Images in Catalan |