WA 02_CHE-121-jul17.rtf - Name Caleb McCully College ID 0633459 Thomas Edison State University General Chemistry I with Labs(CHE-121 Section no Semester

WA 02_CHE-121-jul17.rtf - Name Caleb McCully College ID...

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Name: Caleb McCully College ID: 0633459Thomas Edison State UniversityGeneral Chemistry I with Labs (CHE-121)Section no.: 1.What is the mass number of an iron atom that has 28 neutrons? (3 points) 2. Calculate the number of neutrons of 239 Pu. (3 points) (Reference: Chang 2.14) 93+x=239 x=146 3. Write the appropriate symbol for each of the following isotopes: (a) Z = 11, A = 23; (b) Z = 28, A = 64 (6 points) 34 11 Na ; 92 28 Ni (Reference: Chang 2.17) 4. Define, with two examples, the following terms: (a) alkali metals, (b) alkaline earth metal, (c) halogens, and (d) noble gases . (8 points) Alkali metals are in group 1 of the periodic table and include lithium and sodium. They tend to donate 1 electron. Alkaline earth metals are in group 2 of the periodic table and include magnesium and calcium. They tend to donate 2 electrons.
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