Period 6 element period 6 other metals are incredibly toxic, such as thallium. Period 6 contains the last stable element, lead. All subsequent elements in the periodic table are radioactive. After bismuth, which has a half-life or more than 10 years, polonium, astatine, and radon are some of the shortest-lived and rarest elements known; less than a gram of astatine is estimated to exist on earth at any given time. Caesium or cesium is the chemical element with the symbol Cs and atomic number 55. It is a soft, silvery-gold alkali metal with a melting point of 28 °C (82 °F), which makes
The Unbeheaded King Xylar and Othomae. As usual, the political constraints under which the protagonist labor are at least as important as the fantastic element. The decidedly unromantic, even hardscrabble circumstances under which he must achieve his goals leaven the fantasy with a strong sense of reality, and highlight de Camp's unusual reversal of the genre's stereotypical rags to riches theme. The Unbeheaded King The Unbeheaded King is a fantasy novel by American writer L. Sprague de Camp, the fourth book of his Novarian series and the third in the "Reluctant King" trilogy featuring King Jorian of Xylar. It was first published as