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- (9.3)Match each of the following descriptions with the correct term. Only two electrons with opposing spins are allowed in an orbital. [Choose ] [Choose ] Hund's rule When filling orbitals on the same energy level Pauli's exclusion principle (=degenerate orbitals), electrons fill them singly first (each Aufbau Principle with parallel spin). No two electrons can have the same quantum numbers. [Choose ](9.7)Which of the following is diamagnetic? O Sn²+ O Cr ΟΝ OF(a) Which ion is smaller, Co3+ or Co4+? (b) In a lithium-ionbattery that is discharging to power a device, for every Li+that inserts into the lithium cobalt oxide electrode, a Co4+ion must be reduced to a Co3+ ion to balance charge. Using the CRC Handbook of Chemistry and Physics or other standardreference, find the ionic radii of Li+, Co3+, and Co4+. Orderthese ions from smallest to largest. (c) Will the lithium cobaltoxide cathode expand or contract as lithium ions areinserted? (d) Lithium is not nearly as abundant as sodium.If sodium ion batteries were developed that function in thesame manner as lithium ion batteries, do you think “sodiumcobalt oxide” would still work as the electrode material?Explain. (e) If you don’t think cobalt would work as the redox-active partner ion in the sodium version of the electrode,suggest an alternative metal ion and explain your reasoning.
- 4. Which atom has the desired property? Circle your choice. (21.) More electron shells Са Ве Bigger effective nuclear charge Al or Na or Bigger ionization energy Br Cl Bigger ionization energy Li F or or Bigger atom F Na Bigger atom Cl or F or Higher energy valence electrons Li Higher energy valence electrons К or Li or Better reducing agent K Br Better oxidizing agent Br Cl or or Bigger electron affinity Li Bigger electron affinity Br or Cl or More electronegative S More electronegative P or Al orThe sum of IE1through IE₄ for Group 4A(14) elements shows a decrease from C to Si, a slight increase from Si to Ge, adecrease from Ge to Sn, and an increase from Sn to Pb. (a) What is the expected trend for IEs down a group? (b) Suggest a reason for the deviations in Group 4A(14).(c) Which group might show even greater deviations?11)Explain the given ionization energy for each pair using electron configurations. (12(Be)l1(B), I1(N)>l1(O) ).
- 3.4 Calculate the energy for vacancy formation in nickel (Ni), given that the equilibrium number of vacancies at 850°C (1123 K) is 4.7 x 10²² m³. The atomic weight and density (at 850°C) for Ni are, respectively, 58.69 g/mol and 8.80 g/cm³.7) The Figure 1 in the image shows the variation of ionisation energy, which increases across the periodic table. Account for the anomaly observed in groups 3A and 6A. (8) (8) Using specific examples, explain why atoms are distributed at strange angles in some moleculessep 2.14 The net potential energy between two adja- cent ions, EN, may be represented by the sum of Equations 2.8 and 2.9; that is, В EN (2.11) pn Calculate the bonding energy Eo in terms of the parameters A, B, and n using the follow- ing procedure: 1. Differentiate EN with respect to r, and then set the resulting expression equal to zero, since the curve of EN versus r is a minimum at Eo. 2. Solve for r in terms of A, B, and n, which yields ro, the equilibrium interionic spacing. 3. Determine the expression for E, by sub- stitution of ro into Equation 2.11.
- 8.43 Indicate which one of the two species in each of the following pairs is smaller: (a) Cl or Cl¯; (b) Na or Na*; (c) 02- or S2-; (d) Mg²+ or Al3+; (e) Au* or Au3+6.) which of the following will have a product? Feo + Ni²* (aq) Au + Al³+ Al" → (aq) Nao + Zn?* + Zn²+ + (be) (aq) Al (s) 9 + Au" (aq)9:19 O ul LTE O Review ABookmark MISTRY HONORS 2021-227 of 21 NH3(g) + _ O2(g)→_ N2(g) + _ ,0(g) When the reaction above is completely balanced, the coefficient for NH, will be O A 4 OB 3 OC 5 OD 2 "3 "5 6 8 Q T Y G.