An electron revolve round the nucleus of charge Ze. In order to excite the electron from state n=2 to n=3 the energy required is 47.2 eV. What is the value of Z ?

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Z≡5

Z≡4

Z≡3

Z≡2

answer is A.

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Detailed Solution

Energy of H atom = 13.614-19=1.89eVZ2=47.21.89=24.47≡25⇒Z≡5

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