The function of a photoelectric material is the energy that a photon of light must possess to just expel an electron from the surface of a material. The work function of cesium is 3.42 x 10^-19 Joules.Ê
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The threshold frequency of cesium is the minimum frequency of light required to eject electrons from the metal surface through the photoelectric effect. For cesium, the threshold frequency is approximately 3.5 x 10^14 Hz. Any light with a frequency higher than this value will be able to cause the photoelectric effect in cesium.
The threshold frequency of cesium is approximately 3.3 x 10^14 Hz. This is the minimum frequency of electromagnetic radiation required to eject electrons from the surface of cesium via the photoelectric effect.
The unit of time that equals 9,192,631,770 energy changes of a cesium atom is one second. This definition is the basis for the International System of Units (SI) second, which is defined using the frequency of radiation emitted by cesium-133 atoms.
The compound formed between sulfur and cesium is called cesium sulfide.
The cesium ion is called cesium ion or Cs+.
The correct name for the cesium ion is "cesium ion" or "Cs+ ion".