Create and share a new lesson based on this one.

About TED-Ed Selects

TED-Ed Selects are exceptional, user-created lessons that are carefully selected by volunteer teachers and TED-Ed staff.

Meet The Creators


Additional Resources for you to Explore
For all the basics about iridium, check out the Visual Elements Periodic Table.
For amazing photos and facts about europium, check out The Elements by Theodore Gray.
Due to its resistance to wear, an alloy of iridium and osmium was used in fountain pen nibs and, as a school boy, the professor used such a pen to write all of his high-school exams!