<p>HW chapter 3 and 4 (4.1 -4.10) - Due Monday 1/12/09</p><p>Chapter 3</p><p>1. Classify each of the following properties as physical or chemical.</p><p> a. The color of gold</p><p> b. the liquid propane in a gas grill evaporates because the user left the valve open</p><p> c. sugar dissolves in water</p><p> d. sugar burns when heated on a skillet</p><p>2. Classify each of the following as a pure substance or a mixture. If it is a pure </p><p> substance, classify it as an element or a compound. If it is a mixture, classify it as </p><p> homogenous or homogenous</p><p> a. Sweat b. carbon dioxide</p><p> c. aluminum d. vegetable soup</p><p>A X 3. Write the isotopic symbol using both of the form X-A and Z for the following </p><p> isotopes</p><p> a. The argon isotope with 22 neutrons</p><p> b. The phosphorous isotope with 16 neutrons</p><p> c. The fluorine isotope with 10 neutrons</p><p>1 4. Fill in the blanks to complete the following table.</p><p>Element Z A p n e Iron 30</p><p>27 13</p><p>19 20</p><p>Bromine 80</p><p>5. a. A neutral atom has a mass number of 80 and has 45 neutrons. Write the complete</p><p> symbol</p><p> b. An atom has two more proton and two more electrons than the atom in the </p><p> question above. What is its complete symbol?</p><p>6. Is the element marked in red on the following periodic table likely to be a gas, a </p><p> liquid or a solid? What is the atomic number of the element in blue? Name at lest </p><p> one other element that is chemically similar to the element in green.</p><p>7. Give the names and atomic number corresponding to the following symbols. </p><p>Identify whether it is metal or nonmetal and provide its group name if it has any.</p><p> a. H b. Kr</p><p>2 c. Mg d. Co</p><p> e. Br f. Ra</p><p>3</p>