Detailed Instructions: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: A 2002 paper by Gu, Peng, Harge, Smalley, and Margrave described the addition of atoms of this element to carbon nanotubes followed by pyrolysis of the nanotubes in order to cut them into roughly fifty nm lengths. An isotope of this element is used in a namesake form of NMR due to its lack of a nuclear Overhauser effect and high magnetogyric ratio, while the Gauche effect can be seen in compounds with two of this element attached to adjacent carbons. This element is found in the molten flux used in the Hall-Heroult process, cryolite. Perhaps the best known compound of this element is created by reacting chloroform with molecules of this element bonded to tin and hydrogen, then mixing the result with steam at nine hundred and fifty degrees Celsius to eliminate the hydrochloric acid. FTP, name this element which is found in Teflon.
A:
Science