- Seattle Neighborhoods: Broadview & Bitter Lake — Thumbnail History (historylink.org)
The Broadview neighborhood bordering Puget Sound in northwest Seattle takes its name from the expansive views of Puget Sound and the Olympic Mountains that can be seen from its western slopes. The neighborhood reaches north from N 105th Street to the city limits at N 145th Street, and is bounded on the east by Aurora Avenue N. It is home to Carkeek Park, Evergreen Park Cemetery, the Ida Culver Retirement Home, and Bitter Lake, which beckoned many of the first settlers to the area. It drew its identity from an amusement park called Playland that operated on the south shore of Bitter Lake for 30 years, beginning in 1930. The Seattle-Everett Interurban trolley line ran through the heart of the neighborhood, bringing people and goods to the area and hastening its development. Broadview, once forestland and rural farmland, today is a suburban home to 13,000 residents.
- Polonium (Wikipedia)
Polonium is a chemical element; it has symbol Po and atomic number 84. A rare and highly radioactive metal (although sometimes classified as a metalloid) with no stable isotopes, polonium is a chalcogen and chemically similar to selenium and tellurium, though its metallic character resembles that of its horizontal neighbors in the periodic table: thallium, lead, and bismuth. Due to the short half-life of all its isotopes, its natural occurrence is limited to tiny traces of the fleeting polonium-210 (with a half-life of 138 days) in uranium ores, as it is the penultimate daughter of natural uranium-238. Though longer-lived isotopes exist, such as the 124 years half-life of polonium-209, they are much more difficult to produce. Today, polonium is usually produced in milligram quantities by the neutron irradiation of bismuth. Due to its intense radioactivity, which results in the radiolysis of chemical bonds and radioactive self-heating, its chemistry has mostly been investigated on the trace scale only.