Radon difluoride (RnF2) is a compound of radon, a noble gas. Radon reacts readily with fluorine to form a solid compound, but this decomposes on attempted vaporization and its exact composition is uncertain. Calculations suggest that it may be ionic. The usefulness of radon compounds is limited because of the radioactivity of radon: the longest-lived isotope has a half-life of only 3.82 days.
During World War II, Czechoslovakia disappeared from the map of Europe. The re-emergence of Czechoslovakia as a sovereign state was not only the result of the policies of the victorious Western allies, France, Britain, and the United States, but also an indication of the strength of the Czechoslovak ideal embodied in the First Czechoslovak Republic.
The Greensboro Grasshoppers (formerly the Greensboro Bats and the Greensboro Hornets) are a minor league baseball team in Greensboro, North Carolina, USA. They are a Class A team in the South Atlantic League, and have been a farm team of the Florida Marlins since 2003. The Grasshoppers play home games at NewBridge Bank Park (formerly First Horizon Park), which opened in 2005 and seats 7,499 fans.