Gce Model Questions Vol1 2018 Physics Question 5
Practice objective / multiple choice question 5 from the 2018 Gce Model Questions Vol1 Physics examination.
An unknown hydrogen‑like ion X^{2+} emits a photon of wavelength \(73.0\ \text{nm}\) when an electron transitions from the \(n=4\) level to the \(n=2\) level. The ionisation energy of the ion (energy required to remove the electron from the ground state) is measured to be \(122.4\ \text{eV}\). Using the Rydberg formula for hydrogen‑like ions, determine the atomic number \(Z\) of element X and calculate the wavelength (in nanometres, to one decimal place) of the photon emitted when the electron transitions from \(n=5\) to \(n=2\).
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This is Gce Model Questions Vol1 2018 Physics Question 5. It is one of the objective questions from the 2018 Gce Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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