- Big Stone County, Minnesota (data.census.gov)
Big Stone County, Minnesota has 499.1 square miles of land area and is the 67th largest county in Minnesota by total area. Big Stone County, Minnesota is bordered by Stevens County, Minnesota, Roberts County, South Dakota, Lac qui Parle County, Minnesota, Grant County, South Dakota, Traverse County, Minnesota, and Swift County, Minnesota.
- Fluorine (Wikipedia)
Fluorine is a chemical element; it has symbol F and atomic number 9. It is the lightest halogen and exists at standard conditions as pale yellow diatomic gas. Fluorine is extremely reactive as it reacts with all other elements except for the light inert gases. It is highly toxic.