Ch2 Example Problems

Ch2 Example Problems - HODSON CHE 1301 Petrucci Ch2 Example...

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HODSON CHE 1301 Petrucci Ch2 Example Problems The following problems are taken from old exams . ..... 1) How many neutrons are there in the nucleus of a 232 Th atom? A) 142 B) 90 C) 151 D) 232 E) 81 2) Which of the following pairs of atoms represent isotopes? A) 1 H, 18 O B) 14 N, 14 C C) 79 Br, 35 Cl D) 12 C, 14 C E) 77 Se, 19 F 3) Naturally occurring chlorine consists of the two isotopes: chlorine-35 and chlorine-37. The atomic mass for chlorine is approximately 35.5. What are reasonable estimates of the relative percentages of chlorine-35 and chlorine-37, respectively? A) 75, 25 B) 50, 50 C) 67, 33 D) 25, 75 E) 33, 67 4) Which of the following statements is true concerning the atomic masses of individual Cl atoms? A) All atoms have a mass of 17 u B) All atoms have a mass of 35.45 u C) Some of the atoms have a mass of 35.45 u D) None of the atoms have a mass of 35.45 u E) Most of the atoms have a mass of 35.45 u 5) Lead-204 has a relative abundance of 1.48%. What size block of lead (in cubic
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Ch2 Example Problems - HODSON CHE 1301 Petrucci Ch2 Example...

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