HW3 Solution - Kim Jin Homework 3 Due 11:00 pm Inst Stacy...

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Kim, Jin – Homework 3 – Due: Sep 18 2007, 11:00 pm – Inst: Stacy Sparks 1 This print-out should have 18 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. 001 (part 1 of 1) 2 points Usually the symptom of carbon monoxide poi- soning is 1. yellowing of the eyes and skin. 2. drowsiness. correct 3. shortness of breath. 4. uncontrollable shaking. Explanation: 002 (part 1 of 1) 2 points Which element is in the same group as Si? 1. Mg 2. Sn correct 3. N 4. S 5. As Explanation: Tin (Sn) is in the same vertical column (group) as silicon (Si) and would be expected to have similar properties according to the periodic law. 003 (part 1 of 1) 2 points According to the Periodic Law, which of the following should have properties similar to carbon? 1. H 2. B 3. N 4. Si correct Explanation: Remember that the periodic law predicts that atoms in the same family or group (ver- tical column)will have similar properties. 004 (part 1 of 1) 2 points Which of the following is an alkali metal? 1. Na correct 2. Ca 3. Y 4. Fe 5. Sn Explanation: Alkali metals are in group IA of the periodic table. Thus sodium (Na) is the alkali metal from the given choices. 005 (part 1 of 1) 2 points Of the following elements, the one which is NOT a metal is 1. iron. 2. silver. 3. arsenic. correct 4. cobalt. 5. potassium. Explanation: Iron, cobalt, silver, and potassium are all metals since they are to the left of the line dividing metals and non-metals. Arsenic is the only element to the right of that line. 006 (part 1 of 1) 2 points The compound CaCl 2 is called 1. calcium dichloride. 2. calcium(II) chloride.
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Kim, Jin – Homework 3 – Due: Sep 18 2007, 11:00 pm – Inst: Stacy Sparks 2 3. calcium chloride. correct Explanation: CaCl 2 is an ionic compound. Ionic com- pounds are named by first naming the cation and then the anion. The cation name is sim- ply the element name. The anion name is the stem of the element name with the suffix “-ide”.
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