Chapter 2 - Post-Test - Atoms and Molecules ~ The Chemical Basis of Life

Chapter 2 - Post-Test - Atoms and Molecules ~ The Chemical Basis of Life

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Purav Patel Chapter 2 AP Biology Atoms and Molecules: The Chemical Basis of Life Post-Test 1. The following element is mismatched with its properties: hydrogen is not electronegative, but oxygen is . 2. A neutron is uncharged and located in the nucleus. 3. 32 15 P has 17 neutrons . 4. If atoms A and B are isotopes of one another, they each have six protons . 5. 1 1 Hydrogen and 3 1 Hydrogen have the same chemical properties, because they have the same number of valence electrons . 6. Sodium and potassium atoms behave similarly in chemical reactions, because each has a single valence electron . 7. The orbitals comprising an atom’s valence electron shell may change shape when covalent bonds are formed . 8. The following bond and property attributed is properly matched: covalent bonds may be single, double, or triple . 9. In an oxidation reduction reaction, energy is transferred from a reducing agent to an oxidizing agent . 10. Water has the property called adhesion because
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Unformatted text preview: hydrogen bonds form between water molecules and hydrophilic substances . 11. The high heat of vaporization of water accounts for evaporative cooling . 12. Water has a high specific heat, because hydrogen bonds must be broken to raise its temperature . 13. A solution at pH 7 is considered neutral because its hydrogen ion concentration is equal to its hydroxide ion concentration . 14. A solution with a pH of 2 has a hydrogen ion concentration that is 100 times the hydrogen ion concentration with a pH of 4. 15. The following cannot function as a buffer: NaOH and NaCl , while phosphoric acid is a buffer. 16. NaOH and HCl react to form Na + , Cl-, and water. Na + and Cl-are electrolytes. 17. Avogadros number is the number of particles contained in one mole of a substance, and one mole of 12 C has a mass of 12 grams. 1...
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This note was uploaded on 09/29/2010 for the course BIO 1 taught by Professor Na during the Fall '10 term at Temple.

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