I originally reviewed What Color Is Your Parachute? in five parts, which you can find here, here, here, here, and here if you would like to read the original comments. What Color Is Your Parachute? is the eighteenth of fifty-two books in The Simple Dollarâs series 52 Personal Finance Books in 52 Weeks.
Thallium is extremely soft, malleable and sectile enough to be cut with a knife at room temperature. It has a metallic luster that, when exposed to air, quickly tarnishes to a bluish-gray tinge, resembling lead. It may be preserved by immersion in oil. A heavy layer of oxide builds up on thallium if left in air.
Thallium (IPA : /ËÎ¸aliÉm/) is a chemical element in the periodic table that has the symbol Tl and atomic number 81. This soft gray malleable poor metal resembles tin but discolors when exposed to air. The lead-201 can be produced in a cyclotron by the bombardment of thallium with protons or deuterons by the (p,3n) and (d,4n) reactions. 2  combined with sulfur or selenium and arsenic, thallium has been used in the production of high-density glasses that have low melting points in the range of 125 and 150 Â°C.