Vapor pressure 9.9 x 10-18 mm Hg. 23. 24 KI crystallizes in the sodium chloride structure, hexahedral crystals. It is less hygroscopic than sodium. 25 iodide, making it easier to work with. Potassium iodide is stable in dry air but slightly hygroscopic in. 26 moist air.
Earlier this year China opened the Quindao Haiwan Bridge, the world's longest bridge over water stretching 26.4 miles. With the opening of the Quindao Haiwan, Louisiana's Lake Pontchartrain Bridge fell to second longest after holding the top spot since it opened in 1956. Click here to see the bridges > Â».
Donghai Bridge, China. The 32.5km-long Donghai Bridge, connecting Shanghai and the offshore Yangshan deep-water port in China, is the world's seventh longest road bridge. The bridge forms part of the 42.31km long Shanghai-Luchaogang Expressway (Hulu Expressway) and comprises of six lane expressways.