QUESTION 48 Which of the following statements is TRUE? O The total number of molecular orbitals formed doesn't always equal the number of atomic orbitals in the set. When two atomic orbitals come together to form two molecular orbitals, one molecular orbital will be lower in energy than the two separate atomic orbitals and one O molecular orbital will be higher in energy than the separate atomic orbitals. O Abond order of 0 represents a stable chemical bond. O Electrons placed in antibonding orbitals stabilize the ion/molecule. O All of the above are true. QUESTION 49 Draw the molecular orbital diagram and determine the bond order for Ca₂2+ 03 02 2.5 01 O 0.5 QUESTION 50 In a semiconductor, the bonding molecular orbitals that contain electrons are referred to as the are referred to as the O single bond, antibond O conduction band, valence band O valence band, conduction band On-type, p-type Op-type, n-type while the antibonding orbitals that are completely empty

Quartz crystals are made of silicon dioxide. What is the molecular geometry of silicon dioxide? (*hint* sketch the molecule before answering) O Linear O Bent O Trigonal Pyramidal O Tetrahedral

Geometry Polaritty Holecule Bonding in lormetion Kor centrat atom 3bondingle) pairs - O Tone pairs o Pag

5) Which of the following best describes IC12-? It has a molecular geometry that is A) non-linear molecular shape with lone pairs on the I atom. B) linear molecular shape with no lone pairs on the I atom. C) non-linear molecular shape with no lone pairs on the I atom. D) linear molecular shape with lone pairs on the I atom. 6) What is the molecular geometry of BrF4-? A) square pyramidal B) tetrahedral 7) How many of the following are polar? XeF2, Brl5, BrCl3, SO2, CS2 A) 1 B) 2 C) 3 C) square planar D) 4 D) seesaw E) 5