- Francium (Wikipedia)
Francium is a chemical element; it has symbol Fr and atomic number 87. It is extremely radioactive; its most stable isotope, francium-223 (originally called actinium K after the natural decay chain in which it appears), has a half-life of only 22 minutes. It is the second-most electropositive element, behind only caesium, and is the second rarest naturally occurring element (after astatine). Francium’s isotopes decay quickly into astatine, radium, and radon. The electronic structure of a francium atom is [Rn] 7s1; thus, the element is classed as an alkali metal.
- Lauderdale, Minnesota (Wikipedia)
Lauderdale is a city in Ramsey County, Minnesota, United States. The population was 2,379 at the 2010 census. Lauderdale is part of the Minneapolis–St. Paul metropolitan area and is surrounded by Minneapolis, St. Paul, Roseville, and Falcon Heights. Along with Roseville, it is one of two cities to touch both Minneapolis and St Paul.
