Dr. Casey Name: ______________________Exam 1Fall 2003 Signature: ______________________Chem. 104Honor Statement: By signing this exam, you indicate that you have neither given nor received aid from any unauthorized source.Answer each question in the space provided. If you need more space, use the back of the sheet. All work must be shown to receive partial credit. You have until the regularly scheduled end of class to complete the exam. Good luck!1. State the number of protons, neutrons and electrons in the following isotopes:a. Pb20882b. 247 Ti2. Write the symbol of the elements having the following composition. If the element has an overall charge, include it with the symbol (e.g. Xn+).a. 35 neutrons, 25 protons, 21 electronsb. 113 neutrons, 78 protons, 78 electrons3. Describe each type of bond in terms of the followingi. how electrons are involved in the bondii. the general classes of elements (metals and nonmetals) that participate in each bond typeiii. the magnitude of electronegativity difference between elements in a bond (small, large or no difference)a. ionicb. covalentc. polar covalent4. Match the following terms with their definitions (only 1 term per definition).electron neutron proton nucleus isotope polar covalention anion cation electrode oxidation reductionionic covalent alkaline metal transition metal halogen noble gas semimetal alkaline earth metala. an atom or group of atoms with a positive charge ______________b. elements that generally form +2 ions according to the octet rule ______________c. a particle with a charge (either positive or negative) ______________d. an atom that differs from another atom only by the number ofneutrons ______________e. elements that are very unreactive ______________f. the subatomic particle with the smallest mass ______________g. a group of elements in which the charge of the ions can vary ______________ 5. Fill in Polar or Nonpolar for each of the following:a. A molecule that dissolves in gasoline (C8H18) __________b. A molecule with an –OH group in the structure __________c. A molecule for which the strongest IMF is London Dispersion Forces __________d. A molecule that is soluble in water __________e. A molecule that has a high volatility __________6. A lake has been contaminated with the following chemical: ClClClClClClClCla. Is the molecule polar or nonpolar. Explain.b. If the lake can be broken down into the following compartments, which of these will the chemical enter? Describe the polarity of each compartment and justify your answer.sediment, biota, water7. Fill in the missing information for each of the following molecules.OHOHClClClClClCla. Name all Intermolecular Forcesb. Solubility in water(high or low)c. Solubility in fat(high or low)d. Partitioning into soils(high or low)8. Write names or formulas for the following molecules:a. PF5d. silver (I) sulfateb. BaCl2e. dinitrogen tetroxidec. Fe2O3f. potassium sulfide 9. a. Describe the process of bioaccumulation.b. Which of the following molecules is most likely to bioaccumulate? Justify your answer in terms of the composition of the molecule and the Kow values that are provided.ClClCl Kow = ~100,000OHKow = 29c. What types of organisms are most likely to show adverse affects from a toxic material that