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- 3. Select the CORRECT electron configuration for molybdenum atom. A. [Kr] 5s+4d5 B. [Kr] 5s²4d4 C. [Kr] 5s+4dº D. [Kr] 5s+4d10What is the ground state electron configuration for phosphide ion (p3-)? A. Ne 3s2 B. Ne 3s2 3p3 C. Ne 3p3 D. Ne 3s2 3p69. Which of the following would have the higher ionization energy, explain why: a. K or Ca? Ans. Ca (harder to remove one electron from s2 than s1) b. S or Cl c. O or S? d. Sr or Ba?
- Element that has one unpaired electrons a. 1s2 2s2 2p6 3s2 3p5 b. 1s2 2s2 2p6 3s2 3p6 c. 1s2 2s2 2p6 3s2 3p4 d. 1s2 2s2 2p6 3s7How many of the atoms/ions have the incorrect configuration listed next to it. A. Be: [He]2s² B. Cut: [Ar]4s¹3d¹0 C. Br: [Ar]4s² 3d¹04p5 D. Zn²+: [Ar]4s²3d8 E. N³: [Ne] 1 5 4 2 39. Which of the following would have the higher ionization energy, explain why: d. Sr or Ba?
- Which atoms could have the valence electron configuration shown below? a. N3- b. 02- С. Ar d. Cı- e. all of the aboveThe ground-state electron configuration of a Tc atom is [Kr]5s24d5. What is the electron configuration of a Tc3+ ion? a. [Kr]4d4 b. [Kr]5s14d3 c. [Kr]5s24d8 d. [Kr]5s24d2Write the ground-state electron configurations of the following ions: a. P– b. Co2+ c. O2– d. Sn4+ e. F–
- 12. Determine the number of unpaired electrons in the following atoms or ions. а. Al b. С с. d. Mg Mg* f. е. S6. What is the electronic configuration for the 26Fe+2: 26Fe+3: 29Cu 1: 29Cu+z: 7. Write the electronic configuration of 24Cr: 24Cr3: 24Cr6+: a. Does 24Cr6+ paramagnetic or diamagnetic cation? b. Give the four quantum numbers of the last electron in 24Cr 24Cr3+ 24Cró+. c. Among of the above substances which is the most stable? Justify.U. IImCorrect Hund's Rule d. incorrect, Pauli Exclusion Principle 6. The following element(s) will exhibit paramagnetism in its ground tate. I. N II. P Ш. As I and II b. II and III a, c. I and III d, I, II, and Ш 7. An element has the following abbreviated electron configuration: r]5s°4d'. It is a. Manganese b. Technetium C. Rhenium d. Bohrium 8. Of the atoms below, the atom with the largest radius is