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Question
The metal mainly used in devising photoelectric cells is ______.
Options
Li
Rb
Cs
Na
MCQ
Fill in the Blanks
Solution
The metal mainly used in devising photoelectric cells is Cs.
Explanation:
The photoelectric effect is the phenomenon of electron ejection from metal surfaces when electromagnetic radiations are directed at them. When exposed to light, alkali metals, particularly potassium, and caesium, eject electrons due to their low ionisation enthalpies.
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Group 1 Elements - Alkali Metals
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