1. For a BCC unit cell, the relation between the cube edge length \(a\) and the atomic radius \(R\) is:
2. Which hybridization corresponds to a trigonal planar shape?
3. How many valence electrons does phosphorus have in PCl5?
4. In the valence bond theory, hybridization is used to:
5. In a unit cell where anions (B) are located at each corner and one at the center, and cations (A) are at the center of each face, what is the simplest formula of the compound?
6. What is the simplest formula for an ionic compound with anions at corners and center, and cations at face centers in a cubic unit cell?
7. What hybrid orbital is associated with a tetrahedral shape?
8. In a Body-Centered Cubic (BCC) unit cell, where are the atoms located?
9. In a cubic unit cell where anions (B) are located at each corner and at the center of the unit cell, and cations (A) are at the centers of each face, what is the simplest formula of the compound formed?
10. What is the shape of a molecule with 5 bonding pairs and 0 lone pairs?
11. How many atoms are shared at the corners of a cubic unit cell?
12. In an FCC unit cell, where are the atoms located?
13. What is the coordination number of a Face-Centered Cubic (FCC) structure?
14. In an FCC unit cell, how many atoms are effectively contained in the cell?
15. What is the coordination number of a Hexagonal Close-Packed (HCP) structure?
16. In hybridization, what is formed by mixing atomic orbitals?
17. Which crystal structure is described as having 6 atoms forming a hexagon at the top and bottom and one atom in the center?
18. What does the total number of valence shell electron pairs determine?
19. Which of the following molecules has a trigonal pyramidal shape?
20. What is the best description of the coordination number in metallic crystal structures?
21. What is the coordination number of a BCC structure?
22. The bond angle in a molecule with an angular shape and two lone pairs on the central atom is approximately:
23. Which of the following statements correctly describes the relationship between cube edge length (a) and atomic radius (R) in a body-centered cubic (BCC) structure?
24. In the VSEPR model, what type of electron pairs repel each other the most?
25. The molecule SF6 has how many valence electrons?
26. What is the coordination number of FCC?
27. Using the same unit cell described above, how many cations are present per unit cell?
28. What is the electron pair geometry for a molecule with 2 bonding pairs and 2 lone pairs?
29. Which molecule has a trigonal bipyramidal shape?
30. What determines the structure of an ionic solid?
31. In ionic solids, how are the cations and anions generally arranged?
32. What is the electron pair geometry with 3 bonding pairs and 1 lone pair?
33. For a body-centered cubic (BCC) structure, what is the coordination number of each atom?
34. Which hybridization corresponds to a molecule with a trigonal pyramidal shape and one lone pair?
35. What is the shape of CH4 according to VSEPR?
36. What is the coordination number defined as?
37. The molecule SF6 has how many bonding electron pairs and what is its molecular geometry?
38. What shape does the molecule BF3 have according to VSEPR?
39. How many bonding atoms surround carbon in methane, CH4?
40. In face-centered cubic (FCC) structures, where are the atoms located within the unit cell?
41. Which shape corresponds to an sp3d2 hybridization?
42. What is the shape of PCl5 molecule?
43. For a unit cell with anions at each corner and center, and cations at each face center, how many anions are there per unit cell?
44. What is the formula relating cube edge length \(a\) to atomic radius \(R\) in an FCC unit cell?
45. The bond angle in a tetrahedral molecule is approximately:
46. What is the hybridization of the central atom in CH4?
47. In VSEPR theory, what does the shape of a molecule depend on?
48. What is the bond angle in a trigonal planar molecule?
49. In Valence Bond Theory, which hybridization corresponds to a trigonal planar molecular shape with three bonding pairs and no lone pairs?