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- 2. Your friend says that ionic bonding involves sharing of electrons amongst atoms. Please help revise (fix) your friend's statement and explain why your friend's statement needs some revisions.43. Which of the following statements is correct? Select one: A. The covalent index X2mr is the ability of the metal to donate electrons to an electron acceptor. B. The toxicity of metals increases in the order Borderline < Type A < Type B metals C. The covalent index X2mr cannot be used to differentiate between type A, type B and borderline metal D. The values of ionic index are smallest for type A metals and largest for type B metals. E. The values of covalent index are smallest for type A metal and largest for type B metals.7. What is meant by the term coordination number in the structure of a solid? How does the coordination number depend on the structure of the metal? 8. What is the difference in packing efficiency between the hcp structure and the ccp structure?
- 8. Suppose that a semiconductor device is using a 10.51-mg sample of a hypothetical element By, that is doped with 0.8 % (by mole) of another hypothetical element Do. How many Do atoms are in the sample? Atomic Mass: By: 26.274 g/mol Do: 82.183 g/mol2. Which of the following is a polar molecule? a. Alcohol 3. Intermolecular forces are force b. Acetone c. Water a. Within molecules c. Pushing molecules apart b. Between molecules 4. A water molecule has bonds with an unequal charge distribution. Which of the following categories of bonds does a water molecule have? d. Of Attraction between the protons and electrons a. Metallic b. lonicc. Non-polar d. Polar 5. If liquid A is more polar than liquid B, you might expect a. Liquid A to evaporate faster than liquid B. b. Liquid A to evaporate more slowly than liquid B. c. Liquid A and liquid B to evaporate at the same rate. 6. Which of the following property is the tendency of a liquid to rise in narrow tubes or be drawn into small openings? a. Capillary action b. Viscosity 7. When the cohesive forces between the liquid molecules are greater than the adhesive forces between c. Surface tension d. Adhesion the liquid and the walls of the container, the surface of the liquid is convex. Which…3. What is the bond length of Na-Cl? Given that the atom co-ordinates are Cl(0,0,0) and Na(1/2,1/2,1/2) and lattice parameter a = 0.563 nm.
- 30. The Fermi energy is a constant throughout a semiconductor that is in....... O a. P-type. O b. N-type. O c. Compound. O d. High temperature. O e. Thermal equilibrium.1. Differentiate an Elemental Semiconductor from a Compound Semiconductor. Explain one advantage of Compound Semiconductor.How many valence electrons does a silicon atom have? Please choose one: a. one b. 4 c. 0 D. 2nd
- 1. an element. Sugar dissolved in water is O 2. a compound. O 3. a heterogeneous mixture. O 4. a homogeneous mixture.6.a)What do covalently bonded atoms form? __________________________ b) Describe the attractive forces between the atoms in a molecule and between molecules. Why do molecular compounds have low melting and boiling points compared to ionic compounds? Covalent compounds are soft and squishy compared to ionic compounds. Describe the analogy used to help us understand this comparison. Do covalent compounds conduct electricity when they are mixed with water? Explain.Help me please
