Igcse Model Questions Vol1 2025 Physics Question 14
Practice objective / multiple choice question 14 from the 2025 Igcse Model Questions Vol1 Physics examination.
An electron in a hydrogen atom makes a transition from the \(n=5\) level to the \(n=2\) level, emitting a photon. The same photon is then used to try to ionise a neutral helium atom from its ground state (\(n=1\)). Determine whether the photon has enough energy to ionise helium; if it does not, calculate the additional energy required. Use the Rydberg constant \(R_H = 1.097\times10^{7}\ \text{m}^{-1}\) and the ionisation energy of helium \(E_{ion}(He)=24.6\ \text{eV}\).
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This is Igcse Model Questions Vol1 2025 Physics Question 14. It is one of the objective questions from the 2025 Igcse Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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