1. Draw the electron dot diagram, list the number of bonds and the number of lone pairs each element would prefer to have. a) Ca b) 5i c) Br 2. Draw the Lewis Structure for each molecule. For each molecule/ion: a) Identify and label the polar bonds b) Determine the VSEPR for ALL central atoms c) Determine the overall molecule or ion polarity (write either polar or non-polar) Aluminum trichloride VSEPR: Molecule Polarity: VSEPR: CH4 (two central atoms) Molecule Polarity: HCO3 (two central atoms) VSEPR: lon Polarity: 3. What is a resonance structure and how many resonance structure(s), if any, are there in the molecules above. 4. Label the polar bonds with 8+,5, and the dipole. 5. Fill in the missing lone pairs and then identify the correct VSEPR geometry and bond angles on each line below for the atom indicated. 1. 2. 3. 4. 5. 6. 6. When a fast moving neutron collides with N14 in the atmosphere, carbon-14 is produced along with what subatomic particle? 7. When fast-moving carbon-12 atoms collide with uranium-238 atoms, 4 neutrons are produced along with what synthetic isotope? 8. Cobalt-60 has a half-life of 5.3 years. If you started with a sample containing 64.0mg of co-60, how long would it take until only 4.00mg of Co60 remained