Erbium is discovered by Carl Mosander in 1843. The atomic number is 68. The boiling point 2510 celsius and melting point 1522 celsius. It is a rare earth metal that react to slowly with the oxygen. It was discovered in Ytterby, Sweden where it was mined.
Did you know that erbium is used to make color glass and use in medical lasers to remove acne scars, moles, tattoos and warts. Also is used for nuclear research and photographic filters. Erbium can also be the color pink.