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».
Verrazano-Narrows Bridge, located at the mouth of upper New York Bay, is the longest suspension bridge in the US. It is a double-decker suspension bridge with six lanes per deck. It is named after Giovanni di Verrazano, the first explorer to sail into the New York Harbour and the east coast of North America in 1524.