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.
Cinnamon can be used to remove and prevent blackheads. 1  Mix one teaspoon each of cinnamon powder and lemon juice with a pinch of turmeric powder (optional). 2  Spread it on your face, leave it on for 10 to 15 minutes and then rinse it off. 3  Alternatively, mix one teaspoon of cinnamon powder and honey to form a thick paste. Spread it on your face, leave it on for 10 to 15 minutes and then rinse it off. 2  Alternatively, mix one teaspoon of cinnamon powder and honey to form a thick paste. 3  Apply it on the affected area before bed and leave it on overnight. 4  In the morning, wash your face well with normal water.