always on op be a fixed point If fermion elec- ground state? es of the whole ) (b) Suppose If boson. (It is particles are s imagining a he degenera- What would apart. Use this semiclassical model to estimate the potential energy of the two electrons. Combine this with your answer to part (a) to estimate the total energy of the He atom. Compare with the observed ice ag (See the 10.32 (a) Fin and copp cover. ( those in value of -79.0 eV. (Note: since it close to 10.20 . (a) If the electron had spin s = changed in every other respect), how many different orientations would its spin have? (b) Sketch energy- (but was un- almost were some- cupied in the ground states of 4Be and C if the electron had s = one ele they might erent num- arts of this 10.33 Bec 21 smoot SECTION 10.7 (The Remaining Elements) -10.21 Use the energy-level diagram of Fig. 10.9 to write down the electron configurations of 30Zn, 35Br, saXe, 85At, 87F.. catistics" of ticles. (See ic tab eleme (This Few sever dium 10.22 Use the energy-level diagram of Fig. 10.9 to find the electron configurations of 20C , 23 V, 32GE, 53l, 88R.. ener Fig. 10.7, one tate of 12 322 Chapter 10 Multielectron Atoms; the Pauli Principle and Periodic Table FIGURE 10.9 5f 32 14 9. 7p 6d 10 Schematic diagram showing the order in which levels are occupied 7th shell He 7s 2. Z 86 as one considers atoms with 20 4f 32 14 9. 5d successively higher Z. This is not the energy-level diagram for any one atom; it just gives the order in which levels are occupied as Z increases. The shaded rectangles indicate the groupings of nearby levels into energy shells. The figure to the right of each level or shell gives the number of electrons that can be accommodated; the figures on the far right are the atomic numbers Z of the closed-shell 6th 6s бp 10 15 - 54 10 18 10 5th 58 Sp --36 9- 4p 18 10 3d 4th 4s -18 9- Зр 3rd 3s 0.3- atoms. Note that some levels are 0.2 too close to be ordered unambiguously; for example, 5d is partially occupied before 4f, but 4f is completely filled before 5d. The exact sequence of occupancy can be found from the electron - 10 9- 2p 2nd 8. 2s 0.1 2. 1st 1s configurations shown inside the back cover. After 19K comes calcium (20Ca), whose 4s level is full. Then with scandiun (21SC), the 3d level begins to fill. Since any d level can hold 10 electrons filling of the 3d level talcon 2.

always on op be a fixed point If fermion elec- ground state? es of the whole ) (b) Suppose If boson. (It is particles are s imagining a he degenera- What would apart. Use this semiclassical model to estimate the potential energy of the two electrons. Combine this with your answer to part (a) to estimate the total energy of the He atom. Compare with the observed ice ag (See the 10.32 (a) Fin and copp cover. ( those in value of -79.0 eV. (Note: since it close to 10.20 . (a) If the electron had spin s = changed in every other respect), how many different orientations would its spin have? (b) Sketch energy- (but was un- almost were some- cupied in the ground states of 4Be and C if the electron had s = one ele they might erent num- arts of this 10.33 Bec 21 smoot SECTION 10.7 (The Remaining Elements) -10.21 Use the energy-level diagram of Fig. 10.9 to write down the electron configurations of 30Zn, 35Br, saXe, 85At, 87F.. catistics" of ticles. (See ic tab eleme (This Few sever dium 10.22 Use the energy-level diagram of Fig. 10.9 to find the electron configurations of 20C , 23 V, 32GE, 53l, 88R.. ener Fig. 10.7, one tate of 12 322 Chapter 10 Multielectron Atoms; the Pauli Principle and Periodic Table FIGURE 10.9 5f 32 14 9. 7p 6d 10 Schematic diagram showing the order in which levels are occupied 7th shell He 7s 2. Z 86 as one considers atoms with 20 4f 32 14 9. 5d successively higher Z. This is not the energy-level diagram for any one atom; it just gives the order in which levels are occupied as Z increases. The shaded rectangles indicate the groupings of nearby levels into energy shells. The figure to the right of each level or shell gives the number of electrons that can be accommodated; the figures on the far right are the atomic numbers Z of the closed-shell 6th 6s бp 10 15 - 54 10 18 10 5th 58 Sp --36 9- 4p 18 10 3d 4th 4s -18 9- Зр 3rd 3s 0.3- atoms. Note that some levels are 0.2 too close to be ordered unambiguously; for example, 5d is partially occupied before 4f, but 4f is completely filled before 5d. The exact sequence of occupancy can be found from the electron - 10 9- 2p 2nd 8. 2s 0.1 2. 1st 1s configurations shown inside the back cover. After 19K comes calcium (20Ca), whose 4s level is full. Then with scandiun (21SC), the 3d level begins to fill. Since any d level can hold 10 electrons filling of the 3d level talcon 2.