Chemistry-
General
Easy
Question
An element M has 25 protons. The number of electrons in itsM+2 cation will be:
- 25
- 24
- 23
- 22
The correct answer is: 23
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A parallel beam of monochromatic radiation of cross-section area A( < p a 2), intensity I and is incident on a solid conductingnfrequency 0fsphere of work function and radius 'a' The sphere is grounded by a conducting wire Assume that for each incident photon one photoelectron is ejected Just after this radiation is incident on initially uncharged sphere, the current through the conducting wire is:
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