Questions  

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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By Expert Faculty of Sri Chaitanya
a
Z≡5
b
Z≡4
c
Z≡3
d
Z≡2
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detailed solution

Correct option is A

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

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