Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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- Resonance Structures A molecule with delocalized electrons often cannot be expressed by one single Lewis structure. The structure is represented by several contributing structures called resonance structures. A resonance hybrid is an average of the various Lewis structures. The resonance structure should not be interpreted as a molecule switching between forms, but a molecule acting as an average of multiple forms. Rules for Drawing Resonance Structures: 1. Total number of electrons must stay same. 2. All sigma (single) bonds MUST stay the same. 3. Net charge must stay the same. 4. Pi electrons (double or triple bonds) can move. 5. Nonbonding electrons can move. It is easiest to draw a “template" of the single bonds and then add the extra electrons in various places. Draw the three best Lewis structures for pentadienyl anion, C3H7 using the template below. You have 6 more electrons to add to each one. Calculate the charges. C: 4- Draw the four best Lewis structures for phenoxide anion,…arrow_forwardWrite a Lewis structure for each of the following simple molecules. Show all bonding valenceelectron pairs as lines and all nonbonding valence electron pairs as dots. For those molecules thatexhibit resonance, draw the various possible resonance forms.a. NO2b. H2SO4c. N2O4arrow_forwardWrite a Lewis structure for each of the following molecules. H2CO (carbon is central) Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons.arrow_forward
- Use the following information to determine the Lewis structure, find the electron and molecular geometry of the molecule, determine the angle of the molecule, and determine the polarity. If the atoms are not the same, you may assume that the difference in their electronegativities are between 0.4 and 2.0. Atom information: A: 6 valence electrons, CANNOT exceed the octet. Further from fluorine on the periodic table than X. X: 6 valence electrons, CANNOT exceed the octet. Closer to fluorine on the periodic table than A. Molecule: AX,2- Electron Geometry: [Select] Molecular Geometry: [Select ] Bond Angle: [ Select] Polarity: [Select]arrow_forwardwhich of the following is the correct for the lewis structure of one phosphorous atom with the appropriate number of hydrogen atoms such that a neutral molecule is formed?arrow_forwardUse Lewis theory to determine the formula for the compound that forms between the two elements listed. Express your answer as a chemical formula. A.) Ca and N B.) Mg and I C.) Ca and S D.) Cs and Farrow_forward
- Consider the following Lewis symbols for elements X and Y: X. and. Y. You may want to reference (Pages 185-188) Section 6.5 while completing this problem. Q Search ▼ Part E vetemme now any ions are needed for a total ionic 6- charge. What would be the formula of a compound of X and nitrogen? Express your answer as a chemical formula. ΑΣΦ Review TUIs dit needed LU UDIdill d Uldi IVIC UT a Submit Request Answer Part F Complete previous part(s) A chemical reaction does not occur for this question. S ?arrow_forwardII. Complete the table below. Compound Molecular Geometry Molecule Polarity 1. НCСI 2. H2S 3. CH4 4. N2 Dipole moment of CO2 5. Н2О Take note that bond polarity and molecule polarity are not the same. The presence of polar bonds does not automatically make a molecule polar. The geometry of the molecule also plays an important role. This can be seen in CO2 wherein the electronegativity difference of C and O is 1.0. This equal distribution of polar bonds makes the molecule non- polar.arrow_forwardAnswer the questions in the table below about the shape of the chlorine trifluoride (ClF,) molecule. How many electron groups are around the central chlorine atom? Note: one "electron group" means one lone pair, one single bond, one double bond, or one triple bond. What phrase best describes the arrangement of these electron groups around the central chlorine atom? (You may need to use the scrollbar to see all the choices.) |(choose one)arrow_forward
- Draw a correct Lewis structure for the following molecule where element E is in group 17: CE4 state the molecular geometry of this molecule?arrow_forwarddiagram of a molecule that shows atoms based on their a periodic table symbols. These symbols are surrounded by pairs of dots to show valence electrons that could be lone pairs or bonding pairs?arrow_forwardValence Shell Bonding Nonbonding Approx. Bond Molecule or Lewis Electron Electron Electron VSEPR Geometric Molecular Ion Structure Pairs Pairs Pairs Formula Angle Shape 1. CH4 H 4 4 AX4 109.5° tetrahedral H:C:H H 1. Complete the table (as outlined above) for the following molecules/molecular ions, all of which obey the Lewis octet rule. Complete those that are assigned by your laboratory instructor. d. CH3¯ е. SnH, f. BFarrow_forward
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