Rutina De Los Hamsters

Chapter Test C
Page 31 •
Part A: Multiple Choice
1. B 2. D 3. A 4. C 5. D 6. B
Page 31 • Part B: Completion
1. protons 2. isotopes 3. BF3 4. covalent bonds 5. base
6. organic chemistryPage 32 • Part C: Interpreting Graphs
1. A: hydrogen; B: carbon; C: oxygen; D: nitrogen
2. A 5000-year-old seed can be more accurately dated because there is a greater quantity of carbon-14 remaining.A 100,000-year-old bone has little carbon-14 remaining in it, which greatly reduces the possibility of calculating an accurate age for the artifact. Too many half-lives have passed for the100,000-year-old bone to be accurately dated using carbon-14 with a half-life of only 5730 years.
Page 32 • Part D: Short Answer
1. The box on the periodic table of the elements that contains gold provides theelement’s name, chemical symbol, and average atomic mass. The chart also reveals the number of protons and electrons in gold atoms. The location of gold on the periodic table reveals other elementsthat have similar physical and chemical properties as gold.
2. Without slight positive and negative charges around each molecule, there would be no van der Waals forces to hold the molecules closetogether. The molecules would more easily sepa- rate from each other to form water vapor and most common ionic substances would no longer be soluble in water.
3. Blood is a heterogeneous mixture calleda sus- pension. A suspension has undissolved particles that do not settle out of the liquid. Sugar water is a homogenous mixture called a solution because the sugar completely dissolves in the water.The soil-water mixture is a heterogeneous mixture because it forms two distinct layers of substances.
Page 33 • Part E: Concept Application
1. Hydrogen peroxide and water are different com- poundswith different chemical formulas. The different molecular structure of hydrogen perox- ide completely changes its physical and chemical properties, and these different properties make hydrogen...