Lab - Which Side Are You on[1]

metals lab
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  9 Name ___________________________________ Date __________ Pd _____ Which Side Are You On? The periodic table can be separated into three main groups of elements: metals, nonmetals, and metalloids. Metals are located on the left side of the table, have few valence electrons, are shiny, and are very malleable. Nonmetals are located on the right side of the table, have many valence electrons, have various colors in their elemental states, and are very brittle. Metalloids are located along the steps and have properties that are a mixture of metals and nonmetals. Since metals and nonmetals have opposite properties, it is easy to predict where an element is located by looking at its properties. In this lab, you will evaluate several properties of an element to decide whether it is a metal or a nonmetal. Procedure : 1.   Place a paper towel in the plastic container at your station. Label the paper towel with the following elements: iron, sulfur, zinc, carbon, magnesium, aluminum. Leave space between the names to place your samples. 2.   Obtain a sample of each element from your teacher. Place the sample next to its name in the container. Do not move samples around after you have placed them. 3.   Fill in Data Table 1. The number of valence electrons depends on the group the element is located in - group 1 has 1 valence electron, group 2 has 2, group 13 has 3, group 14 has 4, etc. The number of energy levels depends on the period the element is located in - period 1 has 1 energy level, period 2 has 2, etc. 4.   Scratch each of your samples with the sandpaper. Observe whether the sample gets shiny or stays dull. Record your results in Data Table 2. 5.   Using the forceps, try to bend each of your samples. Observe whether the sample bends or crumbles. Record your results in Data Table 2.  10 6.   Measure 30 mL of hydrochloric acid into your graduated cylinder. Pour 5 mL into each of the test tubes at your station. Place one of the samples into each test tube (use iron filings for this procedure rather than the nail.) Observe the reaction of the element with acid. Record your results in Data Table 2. 7.   Throw all solids into the trash. The sulfur test tube should be given to your teacher for proper disposal. The acid may be poured down the drain with lots of water. Rinse out all test tubes and clean your area. 8.   Answer the questions that follow. Data Table 1. Element Number Valence Electrons Number Energy Levels Iron (Fe) Sulfur (S) Zinc (Zn) Carbon (C) Magnesium (Mg) Aluminum (Al) Data Table 2. Element Shiny or dull Bend or crumble Reaction with acid (none, little, a lot) Iron (Fe) Sulfur (S) Zinc (Zn) Carbon (C) Magnesium (Mg) Aluminum (Al)  11 Questions. 1.   Rank the elements in order of their reaction with acid. Start with the strongest reaction and end with the least. _________________________  _________________________________________________________ 2.   Identify each element as a metal or nonmetal. a.   Iron____________________ d. Carbon_____________________ b.   Sulfur___________________ e. Zinc_______________________ c.   Magnesium________________f. Aluminum___________________ 3.   Predictions. Which of the following elements would be shiny: chromium, bromine, or selenium? ________________________________________ 4.   Predictions. Which of the following elements would crumble: tungsten, phosphorus, or palladium? _____________________________________ 5.   Use Data Table 1 to answer the following sentences. a.   Metals have between ______________ and _______________ valence electrons. b.   Nonmetals have between ______________ and _____________ valence electrons.
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