Which statement(s) is/are true about the use of the images? Image 1 B A. Only statement I is correct. B. Statements I and II are correct. Image 2 1. Image 1 depicts a nonpolar molecule. II. Image 2 depicts a polar molecule. III. Atom B in both images has a greater charge density than atom A. IV. Atom A in both images would likely have a smaller electronegativity value than atom C. Statements I and III are correct. D. Statements I and IV are correct. A

Which statement(s) is/are true about the use of the images? Image 1 B A. Only statement I is correct. B. Statements I and II are correct. Image 2 1. Image 1 depicts a nonpolar molecule. II. Image 2 depicts a polar molecule. III. Atom B in both images has a greater charge density than atom A. IV. Atom A in both images would likely have a smaller electronegativity value than atom C. Statements I and III are correct. D. Statements I and IV are correct. A

Living by Chemistry

2nd Edition

ISBN:9781464142314

Author:Angelica M. Stacy

Publisher:Angelica M. Stacy

ChapterU2: Smells: Molecular Structure And Properties

Section: Chapter Questions

Problem 3STP

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Think of forming an ionic compound as three steps (this is a simplification, as with all models): (I) removing an electron from the metal; (2) adding an electron to the nonmetal; and (3) allowing the metal cation and nonmetal anion to come together. a. What is the sign of the energy change for each of these three processes? b. In general, what is the sign of the sum of the first two processes? Use examples to support your answer. c. What must be the sign of the sum of the three process d. Given your answer to part c, why do ionic bonds occur? e. Given your above explanations, why is NaCl stable but not Na2Cl? NaCl2? What about MgO compared to MgO2? Mg2O?
Use the simulation (http://openstaxcollege.org/l/16MolecPolarity) to perform the following exercises for a two-atom molecule: (a) Adjust the electronegativity value so the bond dipole is pointing toward B. Then determine what the electronegativity values must be to switch the dipole so that it points toward A. (b) With a partial positive charge on A, turn on the electric field and describe what happens. (c) With a small partial negative charge on A, turn on the electric field and describe what happens. (d) Reset all, and then with a large partial negative charge on A, turn on the electric field and describe what happens.
a. How many sticks did you need to make the skeleton structure?____________ b. How many sticks are left over? ____________ If your model is to obey the octet rule, each ball must have four sticks in it except for hydrogen atom balls, which need and can only have one. Each atom in an octet rule species is surrounded by four pairs of electrons. c. How many holes remain to be filled? ____________ Fill them with the remaining sticks, which represent nonbonding electron pairs. Draw the complete Lewis structure for NH2Cl using lines for bonds and pairs of dots for nonbonding electrons.
Why is the geometric structure of a molecule important, especially for biological molecules?
1. Which element will have 5 electrons in its Lewis dot symbol? a. Argon b. Boron c. Carbon d. Phosphorus e. Sulfur 2. Which of the following elements can only form one bond in a Lewis structure? a. O b. C c. N d. Al e. H 3. Write the correct Lewis dot structure for O2. Which statement correctly describes the structure of the whole molecule? a. There is a double bond and four lone pairs. b. There is a double bond and six lone pairs. c. There is a single bond and four lone pairs. d. There is a single bond and six lone pairs. e. There is a single bond, a double bond, and six lone pairs. 4. The electron pair in a C - F bond could be considered… a. Closer to C because Carbon has a larger radius and thus exerts greater control over the shared electron pair b. Closer to F because Fluorine has a higher electronegativity than Carbon c. Closer to C because Carbon has a lower electronegativity than Fluorine d. An inadequate model since the bond is ionic e. Centrally…
Which element will have 5 electrons in its Lewis dot symbol? a. Argon b. Boron c. Carbon d. Phosphorus e. Sulfur Which of the following elements can only form one bond in a Lewis structure? a. O b. C c. N d. Al e. H Write the correct Lewis dot structure for O2. Which statement correctly describes the structure of the whole molecule? a. There is a double bond and four lone pairs. b. There is a double bond and six lone pairs. c. There is a single bond and four lone pairs. d. There is a single bond and six lone pairs. e. There is a single bond, a double bond, and six lone pairs.
Which statement(s) is/are true about the use of the images? Image 1 A. Only statement I is correct. B Statements I and II are correct. Image 2 1. Image 1 depicts a nonpolar molecule. II. Image 2 depicts a polar molecule. III. Atom B in both has a greater charge density than atom A. IV. Atom A in both images would likely have a smaller electronegativity value than atom B. C. Statements I and III are correct. D. Statements I and IV are correct. A B
6. Write the singly bonded Lewis dot structure for BF3. Which of the following statements best describes this structure? A. It obeys the octet rule on all atoms. B. It has less than an octet on at least one atom. C. It has a lone pair of electrons on the boron atom. D. It has less than an octet of electrons on all atoms.
5. Write the chemical formula that results when the following pairs of ions combine to form an ionic bond. a. Sr2* and 02- b. Mn4 and O2- C. Lit and CI- d. Cst+ and Sz-
1. Which statement about chemical bonds is true? a. It is an electrostatic attraction that holds two atoms together.b. It involves the combination of two nuclei of different atoms.c. It involves the temporary attraction between two or more substances.d. It deals with the physical separation of substances to form another set of substances. 2. Which Lewis electron-dot diagram represents a rubidium atom? a. Rb•b. :Rb•c. Rb:d. •Rb• 3. The bond between Br atoms in a Br2 molecule is _______ and is formed by the _________ of two valence electrons. a. ionic ; sharingb. ionic ; transferc. covalent ; sharingd. covalent; transfer
Why do covalent bonds form? 1. Because atoms always want to share electrons. II. Because electrons from one atom are attracted to the nucleus of another atom. III. Because the formation of a bond results in a stable system that would require the input of energy to change. IV. Because atoms always want an octet of electrons around them. 1. I only 2. II and IV 3. Ill only 4. I and II 5. II and III O O O O 1 3 2 5 4
A. State the Octet Rule.B. Write the Lewis symbol of neon. Is the neon atom stable? Does neon exist as atoms in nature? If not, how does neon exist in nature.C. Write the Lewis symbol of nitrogen. Is the nitrogen atom stable? Does nitrogen exist as atoms in nature? If not, how does nitrogen exist in nature.