Lutetium

=**//__ Lutetium __//**=

By: Keith Porter
=** From an ancient name for the city of Paris, Lutetia **=

Carl A ﻿ uer von Welsbach [[image:http://en.academic.ru/pictures/enwiki/65/Auer_von_Welsbach.jpg width="143" height="172"]]
= Discovered in 1907 = = = = = = The symbol is Lu = = = = = = = = = = The atomic number is 71 = = The atomic weight is 174.9668g = = 71 protons/ electrons  =

= 104 neutrons = = It is found in land and it is a solid. = = The physical facts are that it is a type of metal. = = Its melting point is 1663°C or 3025°F = = Its boiling point is 3402°C or 6156°F = = The density is 9.84 grams per cubic centimeter. = = its radioactive isotopes can be used as a catalyst in the cracking of petroleum products. = = The earth’s crustal abundance is 8×10-1 milligrams per kilogram. = = Lutetium was named after Paris. = = It has a hexagon shape. = = [] = = [] = = [] =