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.

The yield of these compounds can be increased through ball milling of some of their components, and one mode of operation of these compounds proceeds through a mechanism called enantiomorphic site control. A process for the operation of these compounds that proceeds through migratory insertions and obeys the "principle of least nuclear motions" was developed by Cossee and Arlman. Compounds such bis(cyclopentadienyl)titanium chloride and bis(indenyl)zirconium dichloride, known as metallocenes, have been developed as an alternative to the traditional compounds of this type. Those traditional initiators include vanadium trichloride and triethylaluminum, and the product of the application of these compounds to alkenes can result in syndiotactic, isotactic, or atactic products. For ten points, identify these stereoselective compounds used to initiate polymerization, named for a German and an Italian chemist.
Science

His reign saw both the publication of the legal treatise Quadripartitus and the earliest surviving European kingdom-wide financial survey, and the exchequer originated at Winchester at the behest of his minister Roger of Salisbury. He fined William de Mandeville for allowing the escape of Ranulf Flambard from the Tower of London, and he had earlier ceded custody of Cotenin to his brother Robert Curthose to avoid war. The wreck of the White Ship resulted in the death of his only legitimate heir, William theling, and his childless marriage to Adeliza of Louvain resulted in his succession by Stephen of Blois. For 10 points, name this man who won the lordship of Normandy in the battle of Tinchebrai, king of England from 1100 to 1135 and the first Norman ruler not named William.
History

The energy of this effect can be measured by the Chung-Jenkins formula. Semiconductor nanocrystals suppress this effect's namesake cooling in a temperature-dependent manner, while a nuclear version of it occurs in the decay of muonic lead-207 and bismuth-209. Another version produces spectator lines due to the creation of bound states, known as the "resonant Raman" version, while a specific version of it is the fast Coster-Kronig transition. In semiconductors, this effect is responsible for a three-particle recombination, while its inverse variety is called "impact ionization". KLL and LMM peaks are measured in a type of spectroscopy named for this effect, which was originally discovered in a cloud chamber. Originally discovered by Lise Meitner and competing with photon emission and electron capture, for 10 points, name this effect in which an electron is ejected from an atom as another electron fills the inner shell, named for a Frenchman.

Science

