Irina Lyublinskaya, Gregg Wolfe, Douglas Ingram , Liza Pujji
ISBN #9781938168932
2,282 Questions
Homework Questions
This section of the textbook provides a comprehensive exploration of atomic physics, beginning with the discovery of the atom and its substructures through key experiments. It discusses Bohr’s model of the hydrogen atom, the quantization of electron orbits through both Bohr’s angular momentum hypothesis and wave interference (de Broglie’s perspective), and the assignment of quantum numbers that define electron states. Additionally, the material extends into nuclear physics, examining radioactivity, radiation detection, nuclear decay conservation laws, binding energy, and tunneling, with an emphasis on how quantization and probability govern both atomic and nuclear phenomena.
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Using the given charge-to-mass ratios for electrons and protons, and knowing the magnitudes of their charges are equal, what is the ratio of the proton’s mass to the electron’s? (Note that since the charge to-mass ratios are given to only three-digit accuracy, your answer may differ from the accepted ratio in the fourth digit.)
(a) Calculate the mass of a proton using the charge-to- mass ratio given for it in this chapter and its known charge. (b) How does your result compare with the proton mass given in this chapter?
If someone wanted to build a scale model of the atom with a nucleus 1.00 m in diameter, how far away would the nearest electron need to be?
Rutherford found the size of the nucleus to be about $10^{-15} m .$ This implied a huge density. What would this density be for gold?
In Millikan's oil-drop experiment, one looks at a small oil drop held motionless between two plates. Take the voltage between the plates to be 2033 $\mathrm{V}$ , and the plate separation to be 2.00 $\mathrm{cm} .$ The oil drop (of density 0.81 $\mathrm{g} / \mathrm{cm}^{3} )$ has a diameter of $4.0 \times 10^{-6} \mathrm{m} .$ Find the charge on the drop, in terms of electron units.