Lithium Lithium Lithium (from ) is a chemical element with symbol Li and atomic number 3. It is a soft, silvery-white alkali metal. Under standard conditions, it is the lightest metal and the lightest solid element. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. When cut, it exhibits a metallic luster, but moist air corrodes it quickly to a dull silvery gray, then black tarnish. It never occurs freely in nature, but only in (usually ionic) compounds, such as pegmatitic minerals which were once the main source of lithium. Due to its solubility
Power Processing Element Power Processing Element The Power Processing Unit (PPU) is a 64-bit dual threaded in-order Power Architecture microprocessor core designed by IBM for use primarily in the game consoles PlayStation 3 and Xbox 360, but has also found applications in high performance computing in supercomputers such as the record setting IBM Roadrunner. In most instances the PPU is joined by a 512 KB L2 cache to form what is called the Power Processing Element (PPE). The PPU is used as a main CPU core in three different processor designs: The PPU is an In-Order processor, but it has some unique traits