Lutetium Summary

Lutetium Lutetium is the heaviest, rarest, and most expensive of the rare earth elements, the elements found in Row 6 of the periodic table between Groups 2 and 3. Lutetium's atomic number is 71, its ... Read more

Lutetium Symbol Lu Atomic Number 71 Atomic Mass 174.97 Family Lanthanide (Rare Earth Metal) Pronunciation loo-TEE-she-um Overview Lutetium is the heaviest, rarest, and most expensive lanthanide eleme... Read more