WA 02_CHE-121-jan18.txt - �Name College ID Thomas Edison State University General Chemistry I with Labs(CHE-121 Section no Semester and year Written

WA 02_CHE-121-jan18.txt - �Name College ID Thomas Edison...

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Name: 1. What is the mass number of an iron atom that has 28 neutrons? (3 points)(Reference: Chang 2.13) 1. Calculate the number of neutrons of 239Pu. (3 points) (Reference: Chang 2.14) 1. Write the appropriate symbol for each of the following isotopes: (a) Z = 11, A = 23; (b) Z = 28, A = 64 (6 points) (Reference: Chang 2.17) 1. Define, with two examples, the following terms: (a) alkali metals, (b) alkaline earth metal, (c) halogens, and (d) noble gases. (8 points) (Reference: Chang 2.22) 1. Identify the following as elements or compounds: (a) NH3, (b) N2, (c) CO, (d)Co, and (e) He. (5 points)
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1. Give the numbers of protons and electrons in each of the following: (a) Na+, (b) Ca2+, (c) Al3+, (d) I–, (e) O2–, (f) N3–, and (g) He. (14 points) 1. Write the molecular formula of glycine, an amino acid present in proteins.
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