Question

why are potassium and cesium , rather than lithium used in photoelectric cells ?
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Answer 1

Explanation:

Because of low ionization enthalpy of potassium and caesium as compared to lithium, they are able to lose their outermost electron when exposed or irradiated with light. This property makes caesium and potassium useful in photoelectric cells.

Answer 2

Answer:

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Explanation:

Because of low ionization enthalpy of potassium and caesium as to lithium, they are able to lose their outermost electron when exposed or irradiated with light. This property makes caesium and potassium useful in photoelectric cells.