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.
Photo 5: Repeat if necessary. Compare the stained area with the surrounding concrete. Repeat the process a second (and perhaps third) time to fully remove the stain. You can't scrub oil and grease stains away.The trick is to draw them up out of the concrete. To do this, mix trisodium phosphate (or a TSP substitute) with water and an absorbent material to make a smooth paste.hoto 5: Repeat if necessary. Compare the stained area with the surrounding concrete. Repeat the process a second (and perhaps third) time to fully remove the stain. You can't scrub oil and grease stains away.