MODERN PHYSICS (LOOSELEAF)
4th Edition
ISBN: 9781119495550
Author: Krane
Publisher: WILEY
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Question
Chapter 8, Problem 27P
(a)
To determine
The effective charge seen by outer electron.
(b)
To determine
The effective charge seen by outer electron in 4f state.
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Students have asked these similar questions
For a K*- CH ion pair, attractive and repulsive energies EA and ER, respectively, depend on
the distance between the ions r, according to
5.8 x 10-6
1.436
EA
and ER
For these expressions, energies are expressed in electron volts per K*- CH pair, and r is the
distance in nanometers.
a) If the net energy EN is just the sum of the two expressions above: EN = E, + ER, Find the
values of ro and E, ?
b) If curves of E, ER, and EN are
plotted in given figure, compare
the calculated values of ro and
E, with that from the graph.
2 am
0.00
010
0.20
0.30
040
0.70
00
1.00
Interatomic Separation, nm
Bonding Energy, eV
a) Calculate the excitation energies for the 1s → 3p electron transition for the H-atom
and for the He+-ion. Calculate the energy values in joules.
b) What is the ionization energy (in eV) of H-atom in the 4d-state?
Note: En
=
2n²
Eh, 1Eh
= 27.2114eV =
2625.500kJ/mol = 4.35974394-10-18 J
The 3p level of sodium has an energy of -3.0 eV, and the 3d level has an energy of 21.5 eV. (a) Determine Zeff for each of these states. (b) Explain the difference.
Chapter 8 Solutions
MODERN PHYSICS (LOOSELEAF)
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- For a K*- CF ion pair, attractive and repulsive energies E, and ER, respectively, depend on the distance between the ions r, according to 1.436 E4 -- 5.8 x 10-6 ER = For these expressions, energies are expressed in electron volts per K*- Cl- pair, and r is the distance in nanometers. a) If the net energy EN is just the sum of the two expressions above: EN = E+ ER, Find the values of r, and E,? b) If curves of E,, ER and EN are plotted in given figure, compare E, the calculated values of ro and E, with that from the graph. -0.28 nm E,-4.6 eV 0.00 0 10 0.20 0.30 0.40 0.50 060 0.70 0.80 00 1.00arrow_forwardThe ionization energy of a carbon atom is 11.26 eV and its electron affinity is 1.26 eV Estimate the value of the Coulomb integral. α. expressing your answer both in electronvolts and as a molar energy in ki lojoules per mole.arrow_forwardA metal has a density of 10.22 g/cm, atomic weight of 95.94 g/mole and atomic radius of 0.136 nm. Is it BCC or FCC? Justify your answer.arrow_forward
- A magnetic field is applied to a freely floating uniform iron sphere with radius R = 2.00 mm. The sphere initially had no net magnetic moment, but the field aligns 12% of the magnetic moments of the atoms (that is, 12% of the magnetic moments of the loosely bound electrons in the sphere, with one such electron per atom). The magnetic moment of those aligned electrons is the sphere’s intrinsic magnetic moment .What is the sphere’s resulting angular speed v?arrow_forwardThe figure shows a potential energy curve for the interaction of two neutral atoms. The two-atom system is in a vibrational state indicated by the heavy solid horizontal line. O eV -0.2 eV+ -0.4 eVF -0.6 eV -0.8 eV- -1.0 eV- -1.2 eV- -1.4 eVF -1.6 ev (a) At r = r1, what are the approximate values of the kinetic energy K, the potential energy U, and the quantity K+U? K = eV U = eV K+U = eV (b) What minimum (positive) amount of energy must be supplied to cause these two atoms to separate? eV Additi. L Matorialsarrow_forward
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