Tin has 50 electrons and five energy levels. There are two electrons in the first energy level, eight in the second, eighteen each in the third and fourth, and four valence electrons in the fifth. This element has the symbol Sn from the Latin word "stannum" for tin.
According to About.com, tin is classified as a metal and is soft and malleable, with a silvery-white appearance. It is used in the manufacturing of cans, as well as in many products to prevent corrosion. Most tin comes from cassiterite, which, according to Reference.com, is a dark mineral also known as tin dioxide. This mineral is found in igneous rocks.