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.

This element's only oxidation state is -1, and it is impossible to free from its compounds by chemical means. It is prepared commercially be the same method which Henri Moisson used to isolate it in 1886, and is also found in the mineral cryolite. Its only isotope is the stabe 19 version, and in its gaseous form takes on a pale yellow color. The most electronegative and reactive of the elements, FTP, what is this lightest of the halogens with atomic number 9 and symbol F
Science

revolt in this city was caused by the working class Cabochiens. Abbo Cernuus provides the only account of the siege of this city in 885, which saw the appearance of Rollo, who later became Robert I of Normandy, command the besieging forces. This Western European city contains a building built to house the Crown of Thorns bought from the Byzantines. In addition to La Sainte-Chapelle, this city saw the Day of the Barricades, forcing Henry III out of this (*) Catholic city. It was extensively renovated under Baron Haussmann. and besieged during the Franco-Prussian War. For 10 points, name this city, the home of the Louvre and capital of France.
History

In physics, the bag model named for this improves the MIT Bag Model in modeling the nucleon. Gleiser et al recently hypothesized that high intensity and long duration events can induce it in a paper unifying it with punctuated equilibrium. The Cahn-Ingold-Prelog priority rule is used in the RS system to distinguish molecules with this property.. First discovered to have a molecular basis by Louis Pasteur in tartaric acid, this property distinguishes enantiomers from one another. For 10 points, what chemical property makes two molecules non-superimposable and gives handedness

Science