Essential University Physics
Essential University Physics
4th Edition
ISBN: 9780134988566
Author: Wolfson, Richard
Publisher: Pearson Education,
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Chapter 36, Problem 67P

(a)

To determine

To verify: The equation En=(13.6 eV)Z2n2 by considering a single-electron atom with nuclear charge Ze instead of e .

(b)

To determine

The ionization energies for single-electron versions of helium, oxygen, lead and uranium.

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Before the neutron was discovered, the only possible constitution of a nucleus with a given (A,Z) was A protons and (A-Z) electrons, leaving a net charge of +Ze. Early indications were that the nitrogen nucleus (A = 14,Z = 7) had a total angular mo- mentum that was an integral multiple of ħ. Is this consistent with a nucleus made of A protons and A-Z electrons? How does the inclusion of neutrons change things?
(a) Show that the speed of an electron in the nth Bohr orbit of hydrogen is αc/n, where α is the fine structure constant, equal to e2/4πε0ħc. (b) What would be the speed in a hydrogen like atom with a nuclear charge of Ze?
(a)Calculate the radius (in m) of the orbit for the innermost electron in osmium assuming it is relatively unaffected by the atom's other electrons. Answer in m (b)What is the ratio of this orbital radius to the 6.90 fm radius of the osmium nucleus? answer in relectron Inucleus answer in R electron/R nuclues

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