Quiz 2 answers - CHM 2045 Quiz #2 Name Key This quiz...

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CHM 2045 Quiz #2 Name Key This quiz consists of 10 questions worth 2 points each. Answer all 10 for full credit. Calculators are allowed but notes or assistance from other students will not be permitted. Your TA will distribute a periodic table. Write on this quiz, but do not write on the periodic table. 1. Give the following characteristics of an ion of iodine-127, I 127 : Answer I. Number of Protons 53 II. Number of Neutrons 74 III. Number of Electrons 54 IV. Atomic Number 53 2. Which pair represent isotopes? (multiple choice, circle one) Answer: C A) Cr 54 24 and Fe 54 26 B) Cd 116 46 and Sn 116 50 C) U 235 92 and U 238 92 D) Np 239 93 and Pu 239 94 3. When He 2+ (α-particles) were shot at a metal foil target to probe the structure of the atom, most of the particles passed through without any deflection in path. Some particles were deflected at large angles. This indicated to Rutherford that (multiple choice, circle one) Answer: C A) the metal foil was continuous matter. B)
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Quiz 2 answers - CHM 2045 Quiz #2 Name Key This quiz...

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