Tin is a chemical element with symbol Sn and atomic number 50. It has two possible oxidation states of +2 and the more stable +4. Tin is the 49th most abundant element and has 10 stable isotopes, more than any other element on the periodic table. It was discovered in 1854 by Julius Pelegrin and has a melting point of 231.9°C and a boiling point of 2,603°C.