What minimum frequency of light is required to ionize potassium?The energy required to ionize potassium is 419kJ/mol? Chemistry The photoelectric work function of a metal is the minimum energy needed to eject an electron by irradiating the metal with light. For calcium, this work function equals 4.34 x 10-19 J.
This video shows how to remove black mastic or carpet glue of concrete floor using FranMar's Bean-e-doo mastic remover. This is an easy and safe way to remove black mastic without toxic fumes. for more information visit www.sealgreen.com.1  Howto & Style. 2  Standard YouTube License.his video shows how to remove black mastic or carpet glue of concrete floor using FranMar's Bean-e-doo mastic remover. This is an easy and safe way to remove black mastic without toxic fumes. for more information visit www.sealgreen.com. 1  Howto & Style. 2  Standard YouTube License.
After removing the mastic, you can stain and seal the concrete for a modern look. Concrete, sometimes referred to as cement, is a prime substrate for many flooring materials, including vinyl. Over time, however, vinyl can lose its appeal or become damaged, which merits removal or replacement.. Scrape the wet concrete with the flat edge of a floor scraper. A floor scraper is a tool with a flat, metal blade attached to a long handle. Remove as much of the mastic as possible.