Which element has a partially filled f subshell A Ba B Eu C Re D Bi 46 How many

Which element has a partially filled f subshell a ba

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45. Which element has a partially-filled f subshell? (A) Ba (B) Eu (C) Re (D) Bi 46. How many orbitals have the quantum numbers n = 4 and l = 2? 47. Which element has the highest second ionization energy? 48. Which ion in the gaseous state has the greatest number of unpaired electrons?
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49. Which property decreases crossing the periodic table from left to right and increases from top to bottom? (A) ionization energy (B) electron affinity (C) electronegativity (D) atomic radius 50. Which compound contains both covalent and ionic bonds? 51. Which species has a Lewis structure most like that of CO32¯? 52. Which element has the greatest electronegativity? 53. Which element has the highest melting point? (A) Al (B) Si (C) P (D) S 54. For which pair of species is the hybridization of the central atom the same? 55. Arrange the species in order of decreasing H-N-H bond angle.
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56. How many moles of water would be produced by the complete combustion of one mole of benzene, C6H6, in excess oxygen? 57. Ketene has the formula H2C=C=O. How many sigma and pi bonds does it have? sigma bonds pi bonds (A) 6 2 (B) 6 0 (C) 4 2 (D) 2 2 58. The prefixes used to designate organic compounds with 3 and 4 carbon atoms are, respectively, 59. Which functional group is characteristic of proteins?
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60. Which substance is most likely to be used as a soap? U.S. National Chemistry Olympiad: 1999 Local Section Test AnswersReturn to 1999 Local Test # 1. A 21. C 41. D 2. B 22. A 42. A 3. C 23. B 43. C 4. A 24. A 44. B 5. D 25. A 45. B 6. C 26. D 46. C 7. B 27. B 47. B 8. A 28. B 48. A 9. C 29. D 49. D 10. A 30. C 50. C 11. D 31. C 51. A
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12. B 32. D 52. C 13. D 33. D 53. B 14. A 34. A 54. A 15. A 35. A 55. D 16. D 36. D 56. B 17. B 37. C 57. C 18. B 38. B 58. D 19. D 39. A 59. D 20. C 40. C 60. C
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