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.
StephenS has a good idea to avoid removing the mastic. If you must remove it, I find that I can knock it off with either a hammer & chisel of if the mastic is real heavy, I use a hammer and a block of wood. You may do some damage to the wall but you won't see it behind the mirror.tephenS has a good idea to avoid removing the mastic. If you must remove it, I find that I can knock it off with either a hammer & chisel of if the mastic is real heavy, I use a hammer and a block of wood. You may do some damage to the wall but you won't see it behind the mirror.