CHEM 120 Week 2 Assignment; Bonding and Naming of Molecules

1. In terms of electrons, what is an excited state? Give an example of an electron configuration for an excited state. (1 points) 2. Give the ground state electron configuration for Fe. (1 points) 3. What is a valance electron? How many valance electrons does Si have? (1 points) 4. What is the shorthand electron configuration of a potassium ion (K+)? (1 points) 5. Give the chemical formula (with charge) for each of the following polyatomic ions: (0.5 points each, 2.5 points total) 6. What is an Ion and what is the difference between an anion and a cation? (1 points) 7. What is the difference between Ionic bonds and covalent bonds? (1 points) 8. Fill in this table (2.5 points, 0.5 points for each row) 9. Label the following compounds as containing polar covalent bonds or nonpolar covalent bonds. (0.5 points each, 2 points total) 10. Draw the electron dot structure for PF3. What is the name of this molecule? (1 points) 11. What are the molecular geometries of CH4 and SiO2? (0.5 points each, 1 point total)