Writing Ionic Formulas A chemical formula is a combination of elemental symbols and subscript numbers that is used to show the composition of a compound.
Here's a timeline of how Wrigley Field (Weeghman Park when it was first built) was constructed, and the various changes that have been made to it over the years. 1914: Opened April 23 as the home of the Federal League Chicago Whales, with a single deck that seated 14,000.
Formerly known as Comiskey Park, U.S. Cellular Field opened April 18, 1991, and was the first new sports facility built in Chicago since Chicago Stadium in 1929. The ballpark features a 53-foot-wide, by 28-foot-tall video screen. The playing field is composed of bluegrass sod, with three different blends of grass.