Period 4 element in period 4, between chromium and iron. Manganese is often found free in nature, but is also found in combination with iron. Manganese, like chromium before it, is an important component in stainless steel, preventing the iron from rusting. Manganese is also often used in pigments, again like chromium. Manganese is also poisonous; if enough is inhaled, it can cause irreversible neurological damage. Iron (Fe) is an element in period 4, between manganese and cobalt. Iron is probably the most well-known element in period 4, being the most common element in the earth and a major component of steel. Iron-56
The Stainless Steel Rat Law of Robotics", which featured the Stainless Steel Rat in the setting of Isaac Asimov's "Robot" series. "The Return of the Stainless Steel Rat", a board game inspired by the character, was published by SPI in their magazine "Ares" in the late 1970s. Designed by Greg Costikyan, the game involved the Rat infiltrating a space station under hostile control. Angelina diGriz is a criminal mastermind much like the Rat, only less ethical and more willing to kill. As the Rat's first case for the Special Corps, he tracks Angelina down and ends up falling in love with her. After her