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exam1 - Form A Dixon EXAM ONE CHEM 131 October 3 2006 Name...

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Form A Dixon EXAM ONE CHEM 131 October 3, 2006 Name: _______________________________ Discussion Section Number:_________ (If you get this right you'll get 1 point extra credit!) "I pledge on my honor that I have not given or received any unauthorized assistance on this examination" Signature Date Place the first letter of your last name in the box below. ± Question 1: _____/4 Question 5: ____/8 Question 9: ____/8 Question 2: _____/5 Question 6: ____/10 Question 10: ____/10 Question 3: --_____/10 Question 7: ____/10 Question 11: ____/5 Question 4: _____/5 Question 8: ____/10 Question 12: ____/5 Question 13: ____/10 TOTAL POINTS: _____/100 ±1. (4 points) Warm Up Exercises. Carbon is a metal / non-metal. (circle one) Electron Affinity is a positive / negative value. (circle one) Sodium / Chlorine has the largest ionization energy. (circle one) Sea water is a homogenous / heterogenous mixture. (circle one) 2. (5 points) The distance between 2 atoms in a structure is 11.5 angstroms. What is this distance in centimeters? (show work) ANSWER: ______________________
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3. (10 points) How many atoms are in 4.86 mL of bromine. The density of bromine is 3.119 g/mm3. (note: bromine is a diatomic and in it's atomic form exists as Br2)
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