Complete the following chart for the given polyatomic anions. Assign formal charges to all atoms in your final Lewis structure. Work out the problem on a separate piece of paper and upload a photo of your response at the end of the test. Please mark the problem clearly and show your work. Ion   Lewis Structure   Resonance (yes or no) Bond Order NO3−         NO2−   PO43−        

H2S Molecular Shape: [shape] Hybridization of the central atom [hybridization] Common name or IUPAC name: [name] Number of sigma bonds: [sigma] Number of pi bonds: [pi]

Written Work Response Some of the following questions will require you to answer on a separate sheet of paper. Make sure to show all of your work, label each question and answer clearly. You will upload photos of your responses at the end of the test.

Determine whether a bond in the compound is polar or nonpolar and whether the molecule as a whole is polar or nonpolar. Place your answers in the table below. Electronegativity of C is 2.5, H is 2.1, and Cl is 3.5. Compound Nonpolar Bond Y/N Polar Bond Y/N Molecule Polar Y/N CH4  [1]  [2]  [3] CH3Cl  [4]  [5]  [6] CH2Cl2  [7]  [8]  [9] CHCl3  [10]  [11]  [12] CCl4  [13]  [14]  [15]  

Which of the following molecules would be sp2 hybridized?  It might help to draw the Lewis structures on your scratch paper.

CO2 Molecular Shape: [shape] Hybridization of the central atom [hybridization] write in normal characters sp, sp2, sp3 Name: [name] Number of sigma bonds: [sigma] Number of pi bonds: [pi]

Describe what makes a bond polar or nonpolar.

Explain the difference between a covalent bond and an ionic bond. Include how electrons affect the bonds.  

O2 Molecular Shape: [shape] Name: [name] Remember — diatomic molecules are named simply as the element’s name. Number of sigma bonds: [sigma] Number of pi bonds: [pi]

Provide the formula for the following compounds. You may submit your response in the box below using the text editing tools or upload a photo of a written response at the end of the test. Please mark the problem clearly and show your work. magnesium bromide cobalt(II) sulfate ammonium hydroxide       potassium cyanide sodium carbonate calcium phosphate     Formula of 1:                    Formula of 2:                    Formula of 3:   Formula of 4:                    Formula of 5:                    Formula of 6: