[6.94] As noted in Figure 6.25, the spin of an electron gener- ates a magnetic field, with spin-up and spin-down elec- trons having opposite fields. In the absence of a magnetic field, a spin-up and a spin-down electron have the same energy. (a) Why do you think that the use of a magnet was important in the discovery of elec- tron spin (see the "A Closer Look" box in Section 6.7)? (b) Imagine that the two spinning electrons in Figure 6.25 were placed between the poles of a horseshoe mag- net, with the north pole of the magnet at the top of the figure. Based on what you know about magnets, would you expect the left or right electron in the figure to have the lower energy? (c) A phenomenon called electron spin resonance (ESR) is closely related to nuclear magnetic resonance. In ESR a compound with an unpaired elec- tron is placed in a magnetic field, which causes the un- paired electron to have two different energy states analogous to Figure 6.27. ESR uses microwave radia- tion to excite the unpaired electron from one state to the other. Based on your reading of the "Chemistry and Life" box in Section 6.7, does an ESR experiment re- quire photons of greater or lesser energy than an NMR experiment?

[6.94] As noted in Figure 6.25, the spin of an electron gener- ates a magnetic field, with spin-up and spin-down elec- trons having opposite fields. In the absence of a magnetic field, a spin-up and a spin-down electron have the same energy. (a) Why do you think that the use of a magnet was important in the discovery of elec- tron spin (see the "A Closer Look" box in Section 6.7)? (b) Imagine that the two spinning electrons in Figure 6.25 were placed between the poles of a horseshoe mag- net, with the north pole of the magnet at the top of the figure. Based on what you know about magnets, would you expect the left or right electron in the figure to have the lower energy? (c) A phenomenon called electron spin resonance (ESR) is closely related to nuclear magnetic resonance. In ESR a compound with an unpaired elec- tron is placed in a magnetic field, which causes the un- paired electron to have two different energy states analogous to Figure 6.27. ESR uses microwave radia- tion to excite the unpaired electron from one state to the other. Based on your reading of the "Chemistry and Life" box in Section 6.7, does an ESR experiment re- quire photons of greater or lesser energy than an NMR experiment?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

6) which second row element of the periodic table has the following sequence of successive ionization energy‘s?
Write the noble gas core ground-state electron configuration for the 3+ ion of Yb. What other ion is Yb likely to form?
Bromine is used in the manufacture of disinfectant products, it has a very strong oxidizing character, due to the great electronic affinity it presents. Based on this, what will be the electron affinity in kJ/mol bromine from the following equations?
What is the ionization energy of a Cl- ion? Express youranswer as a molar energy in units of kJ mol-'
7.5 B What must the distance be between charges of +2.25 and −1.86 for the attractive force between them to be the same as that between charges of +4.06 and −2.11 separated by a distance of 2.16 pm?
What is the most probable position of a 1s electron in Li2+?
Based on data in Table 8.1, estimate (within 30 kJ/mol) thelattice energy for (a) LiBr, (b) CsBr, (c) CaCl2.
The electron configuration of Phosphorus is 1s22s22p63s23p3. Why the spin in 3p3 have to be same spin to be stable? And is there any other atoms also follow this rule?
Since Cs is ionization Energy375.5 kJ/mol. What is the value of the ionic radius?
Bromine is used in the manufacture of disinfectant products, it has a very strong oxidizing character, due to the great electronic affinity it presents. Based on therefore, what will be the electron affinity in kJ/mol of bromine from the following equations?. Explain the development.
Why is the electronic configuration of the yttrium atom [Kr]4d15s2 and that of the silver atom [Kr]4d105s 1?
5. What atomic terms due to spin-orbit interactions are possible for following configurations? For each configuration, which term would have the lowest energy, according to Hund’s Rule? (1) ns^1np^1 and (2) ns^2np^1 ?