(a) Determine the formal charge of oxygen in the following structure. If the atom is formally neutral, indicate a charge of zero. (b) Draw an alternative Lewis (resonance) structure for the compound given in part (a). Show the unshared pairs and nonzero formal charges in your structure. Don't use radicals. Formal charge on O 0

1. a) draw the complete Lewis structure (atoms, dots, lines, dashes, wedges, formal charges) for the formula CBr4 b) draw the complete Lewis structure (atoms, dots, lines, dashes, wedges, formal charges) for the formula NH3

In the following Lewis structure of [SiF6]²;, every atom, bond and lone pair is positioned. To complete the structure, drag the formal charge tags to the appropriate atom(s). Each marker may be used more than once, or not at all. If an atom has a formal charge of zero, do not drag a tag to it. When you drag the marker in, place the little crosshairs in the upper left corner of the marker directly over the atom(s) in question (not above them). :F: :F: 2+ 2- :L: :L:

Consider the incomplete structure shown. Draw an alternative Lewis (resonance) structure for the incomplete structure. Show the unshared electron pairs and nonzero formal charges in your structure. Don't use radicals.     Determine the formal charge on the nitrogen atom in the structure. If the atom is formally neutral, indicate a charge of zero.

The structure at the right is a skeleton of an anion having the overall formula C6H,NO¯. The hydrogen atoms are not shown. (a) Draw a complete Lewis structure in which the -1 formal charge is on N. Include all H atoms and C. valence electrons. (b) Do the same for a Lewis structure with the -1 formal charge on O. (c) Do the same for a Lewis structure with the -1 formal charge on the C atom that is bonded to three other C atoms.

Draw Lewis structures for each of the following ions. One atom in each ion has a formal charge that is not zero.Determine which atom it is, and what the formal charge is. (a) the C2H5 anion; (b) the CH3O cation; (c) the CH6N cation;(d) the CH5O cation; (e) the C3H3 anion (all three H atoms are on the same carbon)

1. a) draw the complete Lewis structure (atoms, dots, lines, dashes, wedges, formal charges) for the formula SF4 b)draw the complete Lewis structure (atoms, dots, lines, dashes, wedges, formal charges) for the formula NH4+

Be sure to answer all parts. Determine the formal charges on each atom in the carbonate ion  ( CO32− ) .  (a) C atom    −2    −1    0    +1    +2 (b) Single bonded O atoms    −2    −1    0    +1    +2 (c) Double bonded O atom    −2    −1    0    +1    +2

The structural formulas for ethanol, CH3CH2OH, and propene, CH;CH=CH,2, are нн H Н—С—С—0—н H-C-C=C-H нн H H H Ethanol Propene (a) Complete the Lewis structure for each molecule showing all valence electrons. (b) Using the VSEPR model, predict all bond angles in each molecule.

Based on the atom connectivity shown bellow,evaluate the four resonance structure for the thiosulfate ion S2O3 ^2-. Use curved arrows to indicate how you get from one resonance structure to another. Assign formal changes to all atoms and determine which of these resonance structure is the most stable based on a formal charge analysis Explain your answer thoroughly. Look at the picture.