calcium & potassium are used in photoelectric cells instead of lithium.why?
Asked by | 22nd Mar, 2008, 08:53: PM
As we go down the group the size increases, I.P decreases. In s block elements as we the I.P is so less that the visible range energy is enough to remove an electron. Hence instead of Li , K , Cs, Ba & Ca are best used in photoelectric cell.
Answered by | 9th May, 2008, 12:28: AM
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