Calcium is a chemical element with symbol Ca and atomic number 20. Calcium is a soft gray alkaline earth metal, fifth-most-abundant element by mass in the Earth 's crust. The ion Ca 2+ is also the fifth-most-abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate.Free calcium metal is too reactive to occur in nature.ith a density of 1.54 g/cm 3, calcium is the lightest of the alkaline earth metals; magnesium (specific gravity 1.74) and beryllium (1.84) are denser though lighter in atomic mass. From strontium onward, the alkali earth metals become denser with increasing atomic mass.
In 1933, United Detroit Theaters acquired the Michigan from Paramount-Publix/Balaban & Katz, who had in turn, purchased it from Kunsky. By the end of the 1930âs, both the live stage shows and the grand Wurlitzer organ were gone, and the theater featured only movies.
By the 1950âs, the stage shows were gone, and the Fisher Theatre began showing only films. Its Wurlitzer was removed in 1956 and installed in the Senate Theater. For the last few years of the 1950âs, the Fisher Theatre became a second-run house and screened its final movie âThe Magnificent Sevenâ in 1960.he Fisher Theatre is a unique Detroit example of a Mayan-style movie palace. Designed by the firm of Graven & Mayger, the Fisher Theatrer could seat 2,715 in its plush auditorium seats.