Daily Archives: September 11, 2017


Lutetium Facts – Atomic Number 71 or Lu

Lutetium is a dense, silvery-white rare earth metal. Here is a collection of interesting element facts for lutetium or cassiopeium: Lutetium was the last natural rare earth element that was discovered. It was discovered in 1907 by three scientists, working independently from each other. Georges Urbain, Charles James, and Carl Auer von […]

Lutetium Electron Configuration

Ancient tattoo ink recipes produce ink that is black or brown. (Giulia Bertelli)

Ancient Roman Tattoo Ink Recipe

This ancient tattoo ink recipe was devised by the Roman physician Aetius. It can be expected to produce a nice permanent iron-based ink, though the ingredients may cause irritation for some individuals. The reader is advised that this recipe is of historical significance, but safer and higher quality inks are available […]