Give reason: Be n Mg do not show photoelectric effect.

Asked by prernamehta | 2nd Oct, 2010, 04:09: PM

Expert Answer:

When electromagnetic radiation strikes on the surface of alkali metals, they emit electrons. This is called the photoelectric effect.
This occurs as alkali metals have low ionization energies, which allows the electrons to be easily ejected when exposed to light. Among alkaline earth metals  metals, Be and Mg has highest ionization energy and hence it can't show photoelectric effect to the some extent.

Answered by  | 2nd Oct, 2010, 07:51: PM

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