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».
Confederation Bridge. The Confederation Bridge is a world engineering feat. It connects Prince Edward Island to the mainland over the Northumberland Strait in the southern part of the Gulf of Saint Lawrence. At 12.9 kilometres or 8 miles long it is longest bridge in the world over ice-covered waters.