With a cornice, it is the fascia board. May also be called verge board. Base or Baseboard: A narrow board or member placed at the juncture of the floor and wall to cover the joint. Base Cap: A strip of wood or other molding used to finish the upper edge of the baseboard. Base Shoe: A trim piece of wood or other material used at the bottom of the baseboard.
Russiaâs Secret City: The Most Radioactive Place On Earth. âThe arms race is a race between nuclear weapons and ourselves.â âMartin Amis. In A Nutshell. Russiaâs Lake Karachay was used in the 1950s as a dumping site for radioactive waste. Now it is the most polluted place on the planet, with enough radioactivity to kill a person in less than an hour. At its height, it was putting more than 200,000 times the normal amount of radioactivity into the area due to poor waste disposal practices.
It has the symbol Pu and the atomic number 94. It is the element used in most modern nuclear weapons. The most significant isotope of plutonium is 239 Pu, with a half-life of 24,100 years. It can be made from natural uranium and is fissile.The most stable isotope is 244 Pu, with a half-life of about 80 million years, long enough to be found in extremely small quantities in nature.lutonium-239 is one of the three fissile materials used for the production of nuclear weapons and in some nuclear reactors as a source of energy. The other fissile materials are uranium-235 and uranium-233. Plutonium-239 is virtually nonexistent in nature.