Uranium-235 was discovered by Arthur Jeffrey Dempster in 2005.
Grignan is a commune in the Drome department in the Auvergne-Rhone-Alpes region in southeastern France .. commune. Communes of France. Drome. Drome. department. Departments of France. Auvergne-Rhone-Alpes. Auvergne-Rhone-Alpes. region. Regions of France. France. France. It has a magnificent Renaissance castle and is mentioned in the letters that Madame de Sevigne wrote to her daughter , Madame de Grignan , in the 17th century .. Madame de Sevigne. Marie de Rabutin-Chantal, marquise de Sevigne. Madame de Grignan. Francoise-Marguerite de Sevigne