Chem_12_Exam_1_review - Chem 110 1 Review questions for...

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Chem 110 Review questions for Exam #1 Spring 2008 1. Which of the following represents the greatest length? a) 1,000,000 nanometers b) 10,000 micrometers c) 1000 centimeters d) 100 millimeters e) 0.0010 kilometers 2. The symbol for the species containing 29 protons, 34 neutrons, and 27 electrons is 3. Based upon the experiments of his co-workers, Rutherford proposed that 4. The atomic mass unit (amu) is exactly equal to 5. The element tin (Sn) occurs naturally as a mixture of ten isotopes. Each of these isotopes has a) 50 protons b) 50 electrons c) a different number of neutrons d) all of the above 6. For which atom is it difficult to predict the most probable ionic charge using the periodic table? 7. Would you expect each of the following atoms to gain or lose electrons when forming ions? Predict the charge on the ion each atom will form. 8. Predict the formula of the binary compound formed from the following elements. a) barium and oxygen b) calcium and nitrogen c) indium and fluorine
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9. Covalent bonds generally form between 10. An element consists of 1.40% of an isotope with mass 203.973 amu, 24.10% of an isotope with mass 205.9745 amu, 22.10% of an isotope with mass 206.9759 amu, and 52.40% of an isotope with mass 207.9766 amu. Calculate the average atomic mass and identify the element. 11. The element rhenium (Re) has two naturally occurring isotopes, 185 Re and 187 Re, with an average atomic mass of 186.207 amu. Rhenium is 62.60% 187 Re and the atomic mass of 187 Re is 186.956 amu.
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