WA 02_CHE-121-Feb 16.docx - Name:Brandon Upton Thomas...

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Name:Brandon UptonThomas Edison State UniversityGeneral Chemistry I with Labs (CHE-121)Section no.: 2Semester and year: Feb 2020Written Assignment 2: Atomic Structure and Chemical CompoundsAnswer all assigned questions and problems, and show all work.1.What is the mass number of an iron atom that has 28 neutrons?(3 points)
2.Calculate the number of neutrons of239Pu.(3 points)
3.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)a)2311NAb)
4.Define, with two examples, the following terms: (a) alkali metals, (b) alkaline earthmetal, (c) halogens, and (d) noble gases.(8 points)(Reference: Chang 2.22)a)The group 1A elements (Li, Na)b)The group2A elements (Be, Mg)c)Non metallic elements in group 7a (F, Cl)d)Non metallic elements in group 8a (He, Ne)

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Term
Spring
Professor
Khurana
Tags
Atom, Chemical element, Thomas Edison State University

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