Here is a question about this article: The alkali metal ions are small and mobile; their presence in glass allows a degree of electrical conductivity, especially in molten state or at high temperature. Their mobility decreases the chemical resistance of the glass, allowing leaching by water and facilitating corrosion. Alkaline earth ions, with their two positive charges and requirement for two non-bridging oxygen ions to compensate for their charge, are much less mobile themselves and also hinder diffusion of other ions, especially the alkalis. The most common commercial glasses contain both alkali and alkaline earth ions (usually sodium and calcium), for easier processing and satisfying corrosion resistance. Corrosion resistance of glass can be achieved by dealkalization, removal of the alkali ions from the glass surface by reaction with e.g. sulfur or fluorine compounds. Presence of alkaline metal ions has also detrimental effect to the loss tangent of the glass, and to its electrical resistance; glasses for electronics (sealing, vacuum tubes, lamps...) have to take this in account.
What is the answer to this question: Reaction with what causes dealkalization?
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So... sulfur or fluorine compounds


Here is a question about this article: On September 23, 1908, the Cubs and New York Giants were involved in a tight pennant race. The two clubs were tied in the bottom of the ninth inning at the Polo Grounds, and N.Y. had runners on first and third and two outs when Al Bridwell singled, scoring Moose McCormick from third with the Giants' apparent winning run, but the runner on first base, rookie Fred Merkle, left the field without touching second base. As fans swarmed the field, Cub infielder Johnny Evers retrieved the ball and touched second. Since there were two outs, a forceout was called at second base, ending the inning and the game. Because of the tie the Giants and Cubs ended up tied for first place. The Giants lost the ensuing one-game playoff and the Cubs went on to the World Series.
What is the answer to this question: Who was the runner on first base?
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So... Fred Merkle


Here is a question about this article: Irish, Italians, Polish, Germans, English, and Greeks are the largest ethnic European groups in the city. Philadelphia has the second-largest Irish and Italian populations in the United States, after New York City. South Philadelphia remains one of the largest Italian neighborhoods in the country and is home to the Italian Market. The Pennsport neighborhood and Gray's Ferry section of South Philadelphia, home to many Mummer clubs, are well known as Irish neighborhoods. The Kensington section, Port Richmond, and Fishtown have historically been heavily Irish and Polish. Port Richmond is well known in particular as the center of the Polish immigrant and Polish-American community in Philadelphia, and it remains a common destination for Polish immigrants. Northeast Philadelphia, although known for its Irish and Irish-American population, is also home to a large Jewish and Russian population. Mount Airy in Northwest Philadelphia also contains a large Jewish community, while nearby Chestnut Hill is historically known as an Anglo-Saxon Protestant stronghold.
What is the answer to this question: Name the six largest European ethnic groups in the city?
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So...
Irish, Italians, Polish, Germans, English, and Greeks