10.9. Why are potassium and caesium, rather than lithium used in photoelectric cells?
10.9. Why are potassium and caesium, rather than lithium used in photoelectric cells?
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Potassium and caesium have much lower ionization enthalpy than that of lithium. As a result, these metals easily emit electrons on exposure to light. Due to this, K and Cs are used in photoelectric cells rather than lithium.
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Li+ has the highest hydration enthalpy.
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