Manipal MET2016ChemistryStructure of Atom

Which of the following element has maximum photoelectric effect?

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Correct answer

D. Cs

Step-by-step solution

The phenomenon of emission of electrons from the surface of metal by visible light is called photoelectric effect. All alkali metals (except lithium) exhibits photoelectric effect. This ability to exhibit photoelectric effect is due to low value of their ionisation energies. Among alkali metals, Cs having least ionisation energy, exhibits maximum photoelectric effect.

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