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Rack-O is a Milton Bradley sequential- matching card game with the objective of obtaining 10 numbers, in numerical order, in one's hand. Score may be kept on a separate piece of paper, based upon either a custom system or the system provided in the rule book. Rack-O allows between 2–4 players, and is recommended for players age 8 and up. [2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Radium carbonate is a chemical compound of radium, carbon, and oxygen, having the chemical formula Ra C O 3. It is the radium salt of carbonic acid. It contains radium cations (Ra2+) and carbonate anions (CO2− 3).
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U.S. Area served. U.S., Canada, New Zealand. Products. Railway Signalling, Traffic Signalling. The Griswold Signal Company was an American company focused on railway signalling, based in Minneapolis, Minnesota. Founded by Minnesota native Franklin Wolcott Griswold, [1] the company manufactured traffic signals and railroad level crossing signals.
Radium nitrate is a radioactive salt with the formula Ra (NO 3) 2. It is a white solid, but old samples appear yellowish-grey. Although radium chloride and radium bromide are less soluble than the corresponding barium salts, radium nitrate is more soluble than barium nitrate. [1][2] It decomposes at 280 °C to radium oxide. [citation needed]
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Solubility in water. reacts with water. Related compounds. Related compounds. Barium oxide. Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references. Radium oxide is an inorganic compound of radium and oxygen with the chemical formula RaO. [1][2][3]
As of Unicode version 16.0, there are 155,063 characters with code points, covering 168 modern and historical scripts, as well as multiple symbol sets.This article includes the 1,062 characters in the Multilingual European Character Set 2 subset, and some additional related characters.