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Ch.12 - Solids and Solid-State Materials

Chapter 12, Problem 7

Examine diagrams for the electron population of the composite s–d band for three metals in question 6. Which metal has the highest melting point? (LO 12.7) (a) Metal 1 (b) Metal 2 (c) Metal 3

Energy diagram showing bonding and antibonding states for three metals in a chemistry course.

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Hello everyone today. We have the following problem shown below are the electron distributions in the S. D. Band of three medals rank them in order of increasing melting point. So it's important to note a couple of key components. So the more electrons that we have in the bonding orbital's, the higher our melting point. Also, the more electrons that we have in our anti bonding orbital's, the less our melting point will be. So we will have a lower melting point. And so if you look at one, we see that all of the anti bonding electrons have been filled and so as a result, one has the lowest melting point. And so we can get rid of answer choices B and see If you look at answer choice three or option three. We notice that there are only bonding electrons filled in the orbital's and so we're going to have the highest melting point in the three, leaving us with answer choice A as our answer overall, I hope this helped and until next time.
Related Practice
Textbook Question
Diffraction of X rays with l = 131.5 pm occurred at an angle of 25.5 degrees by a crystal of aluminum. Assuming first-order diffraction, what is the interplanar spacing in aluminum? (LO 12.2) (a) 76.4 pm (b) 183.1 pm (c) 305.5 pm (d) 152.7 pm
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Niobium oxide crystallizes in the following cubic unit cell:

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Textbook Question
The following diagrams represent the electron population of the composite s–d band for three metals—Ag, Mo, and Y:

Which diagram corresponds to which metal? (LO 12.7) (a) Ag = 3, Mo = 1, Y = 2 (b) Ag = 2, Mo = 1, Y = 3 (c) Ag = 2, Mo = 3, Y = 1 (d) Ag = 1, Mo = 2, Y = 3
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Textbook Question
The following diagrams represent the electron population of molecular orbitals for different substances. What diagram corresponds to magnesium oxide, germanium, and tin? (LO 12.8)

(a) Diagram 1 = tin, diagram 2 = magnesium oxide, diagram 3 = germanium (b) Diagram 1 = germanium, diagram 2 = magnesium oxide, diagram 3 = tin (c) Diagram 1 = germanium, diagram 2 = tin, diagram 3 = magnesium oxide (d) Diagram 1 = magnesium oxide, diagram 2 = tin, diagram 3 = germanium
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The molecular orbital diagram of a doped semiconductor is shown below. If the semiconductor is silicon, does the diagram represent n-type or p-type doping and which of the following elements could be dopant? (LO 12.9)

(a) n-type, As (b) n-type, Ga (c) p-type, As (d) p-type, Ga
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