Doubt

Asked by  | 21st Mar, 2009, 11:22: AM

Expert Answer:

Chemicals that are photosensitive may undergo chemical reactions when exposed to light. Photosensitivity typically is the amount to which an object reacts upon receiving photons, especially visible light. Now alkali metals need to llose only one electron to acheive the noble state. So the free energy for reaction in which a photon comes and strikes of the outermost electron is highly negetive. This is the reason for alkali metals being photosensitive even to visible light.

Answered by  | 29th Mar, 2009, 05:37: PM

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