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.
How to Remove Rust from Cement. Four Methods: Use lemon juice to remove rust from cement. Use vinegar to remove rust from cement. Use a commercial cleaner to remove rust from cement. Use Trisodium Phosphate (TSP) to remove rust from cement.Rust stains on cement are a common problem for homeowners, especially those who use well water, as it is common for well water to contain high levels of iron.ow to Remove Rust from Cement. Four Methods: Use lemon juice to remove rust from cement. Use vinegar to remove rust from cement. Use a commercial cleaner to remove rust from cement. Use Trisodium Phosphate (TSP) to remove rust from cement.