A) Cs
B) Na
C) K
D) Li
Correct Answer: A
Solution :
[a] Cs Photoelectric effect: When electromagnetic radiation strikes on the surface of alkali metals, they emit electrons, i.e. photoelectric effect. Among all group 1 element, (Li, Na, K, Rb, & Cs) Cs has lowest ionization energy and hence it can show photoelectric effect to the maximum. (As low I.E. allows the electrons to be easily ejected when exposed to light.)You need to login to perform this action.
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