Lithium be cut with a knife. When cut, it possesses a silvery-white color that quickly changes to gray as it oxidizes to lithium oxide. While it has one of the lowest melting points among all metals (180 °C), it has the highest melting and boiling points of the alkali metals. Lithium has a very low density (0.534 g/cm), comparable with pine wood. It is the least dense of all elements that are solids at room temperature; the next lightest solid element (potassium, at 0.862 g/cm) is more than 60% denser. Furthermore, apart from helium and hydrogen, it is less dense than
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