The Bohr model of the atom
Answers are for parents and teachers.
1
The n = 5 orbit radius is how many times r_B?
25
2
How many different lines can hydrogen emit while dropping from n = 5 to lower levels?
10
3
What is the minimum photon energy to ionise a hydrogen atom in the n = 2 state?
3.4 eV
4
Approximate wavelength for the n = 3 → 2 jump (ΔE ≈ 1.89 eV; hc = 1240 eV·nm)?
≈ 656 nm
5
Why does ground-state hydrogen not absorb an 8 eV photon?
The energy does not match a level difference: the nearest level is at 10.2 eV and ionisation needs 13.6 eV.