Pure potassium is a solid with a silver white color that tarnishes easily when exposed to oxygen. This element is located in the alkali metal group (group 1) on the periodic table. Potassium's symbol is K, and its atomic number is 19.
Potassium was discovered in 1807 by Sir Humphrey Davy. The name potassium is a combination of the English word potash, which means pot ashes, and the Arabic word qali, which means alkali.
Potassium is a vital element for many living things, including humans. It can be found in several specific types of cells, including smooth muscle cells, skeletal cells and cardiac cells. Potassium assists with the functions of nerve in humans and is a part of photosynthesis in plants.