Text: Work Functions for Photoelectric Effect WR# Element Work Function(eV) +3 Aluminum 4.08 +2 Beryllium 5.0 -3C Cadmium 4.07 +2 Calcium 2.9 +4 Carbon 4.81 +1 Cesium 2.1 +4 Cobalt 5.0 -4D Copper 4.7 -3D Gold 5.1 +3E Iron 4.5 -3A Lead 4.14 +2 Magnesium 3.68 -3C Mercury 4.5 -4E Nickel 5.01 +3B Niobium 4.3 +1 Potassium 2.3 -3F Platinum 6.35 -2 Selenium 5.11 -3D Silver 4.73 +1 Sodium 2.28 +3C Uranium 3.6 -4C Zinc 4.3 Some data from Handbook of Chemistry and Physics.

See Also:

Source: