Questions
A hydrogen like atom of atomic number Z is in an excited state of quantum number 2n. It can emit a maximum energy photon of 204 eV. If it makes a transition to
quantum state n, a photon of energy 40.8 eV is emitted. The value of n will be
detailed solution
Correct option is B
Let ground state energy (in eV) be E1Then from the given conditionE2n−E1=204eV ⇒ E14n2−E1=204eV ⇒E114n2−1=204eV.......(i) and E2n−En=40.8eV ⇒E14n2−E1n2=E1−34n2=40.8eV........(ii) From equations (i) and (ii), 1−14n234n2=5 ⇒n=2Talk to our academic expert!
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