Chapter 8: Q18CQ (page 338)
Question: As indicated to remove one of the helium’s electrons requires of energy when orbiting ? Why or why not?
Short Answer
Answer
No, the Energy of orbiting electron is not .-24.6 ev
Chapter 8: Q18CQ (page 338)
Question: As indicated to remove one of the helium’s electrons requires of energy when orbiting ? Why or why not?
Answer
No, the Energy of orbiting electron is not .-24.6 ev
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Get started for freeUsing a beam of electrons accelerated in an X-ray tube, we wish to knock an electron out of the shell of given element in a target. Section \(7.8\) gives the energies in a hydrogen like atom as . Assume that for fairly high Z , aK-shell electron can be treated as orbiting the nucleus alone.
(a) A typical accelerating potential in an X-ray tube is . In roughly how high aZcould a hole in the K -shell be produced?
(b) Could a hole be produced in elements of higher Z?
Your friends ask: “Why is there an exclusion principle?” Explain in the simplest terms.
Is intrinsic angular momentum "real" angular momentum? The famous Einstein-de Haas effect demonstrates it. Although it actually requires rather involved techniques and high precision, consider a simplified case. Suppose you have a cylinder in diameter hanging motionless from a thread connected at the very center of its circular top. A representative atom in the cylinder has atomic mass 60 and one electron free to respond to an external field. Initially, spin orientations are as likely to be up as down, but a strong magnetic field in the upward direction is suddenly applied, causing the magnetic moments of all free electrons to align with the field.
(a) Viewed from above, which way would the cylinder rotate?
(b) What would be the initial rotation rate?
What is the minimum possible energy for five (non-interacting) spin particles of massmin a one dimensional box of length L ? What if the particles were spin-1? What if the particles were spin ?
The Zeeman effect occurs in sodium just as in hydrogen-sodium's lone valence electron behaves much as hydrogen's 1.5. Suppose sodium atoms are immersed in amagnetic field.
(a) Into how many levels is thelevel split?
(b) Determine the energy spacing between these states.
(c) Into how many lines is thetospectral line split by the field?
(d) Describe quantitatively the spacing of these lines.
(e) The sodium doublet is two spectral lines.and. which are split according to the two differentpossible spin-orbit energies in the 3Pstate (see Exercise 60). Determine the splitting of the sodium doublet (the energy difference between the two photons). How does it compare with the line splitting of part (d), and why?
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