Igcse Model Questions Vol1 2025 Physics Question 9
Practice objective / multiple choice question 9 from the 2025 Igcse Model Questions Vol1 Physics examination.
An electron in a hydrogen atom is initially in the \(n=5\) energy level. It first drops to \(n=2\) and then to the ground state \(n=1\), emitting a photon at each transition. Using the Rydberg constant \(R = 1.097\times10^{7}\ \text{m}^{-1}\), calculate (a) the total energy released in the two transitions per mole of hydrogen atoms (in kJ\,mol\(^{-1}\), to three significant figures) and (b) the wavelength of the photon emitted in the second transition (in nm, to three significant figures).
Answer Options
About This Question
This is Igcse Model Questions Vol1 2025 Physics Question 9. It is one of the objective questions from the 2025 Igcse Model Questions Vol1 Physics examination.
Difficulty level: Hard .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.