B.A. B.Sc.B.Eng.

Which University degree?

1) Calculate the energy of an electron in the ground state of a hydrogen atom2) Calculate the energy of an electron in the second excited state of a hydrogen atom3) What is the energy of the photon in the second line of the Lyman series?

h = Plancks constant = 6.63x10-34 Jsc = speed of light = 3x108 ms-1

R = Rydbergs constant = 1.097x107 m-1

2n

hcREn

Do NowDo Now:: Thursday, April 20, 2023

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LSR

The Hydrogen SpectrumThe Hydrogen Spectrum

1 2 3 4 5

Lyman Series S=1 (UV)

Balmer Series S=2 (visible)

Paschen Series S=3 (IR)Bracket Series S=4 (IR)

Pfund Series S=5 (IR)

Nucleus

Shell no. / Energy level

Tasks:

1) Today: old exam questions on spectra

2) Tomorrow: revision material on all 3 topics (nuclear, photoelectric, spectra)

3) Friday: mock test

4) Monday: review mock test

5) Wednesday: assessment (35 min) - no re-sits

Note:Activity 11D and Homework Set 2 should be finished