- Radium is a chemical element; it has symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals. Pure radium is silvery-white, but it readily reacts with nitrogen (rather than oxygen) upon exposure to air, forming a black surface layer of radium nitride (Ra3N2). All isotopes of radium are radioactive, the most stable isotope being radium-226 with a half-life of 1,600 years. When radium decays, it emits ionizing radiation as a by-product, which can excite fluorescent chemicals and cause radioluminescence. For this property, it was widely used in self-luminous paints following its discovery. Of the radioactive elements that occur in quantity, radium is considered particularly toxic, and it is carcinogenic due to the radioactivity of both it and its immediate decay product radon as well as its tendency to accumulate in the bones.
- Moran State Park (Wikipedia)
Moran State Park is a public recreation area on Orcas Island in Puget Sound’s San Juan Islands in the state of Washington, United States. The state park encompasses over 5,000 acres of various terrain including forests, wetlands, bogs, hills, and lakes. It is the largest public recreation area in the San Juan Islands and the fourth largest state park in the state. A park focal point is the observation tower atop Mount Constitution, the highest point in San Juan County at 2,407 feet.