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.
Step 3 â Remove Stains. There is not just one way to remove stains found on sandstone. For organic stains like mold and mildew, use hydrogen peroxide to remove it. For oil, use acetone and for grease stains, mound talc on top of the stain.Each of these methods with the exception of talc, are scrubbed on.tep 1 â Cleaning the Patio. Remove everything that may be sitting on top of the patio. This includes plants, tables, chairs and the grill. The patio should be completely free and clear of anything. Then, sweep off the surface of the patio, to remove loose debris such as dirt, leaves and twigs.