Chemistry: Semester Review 3 Questions, homework help

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Please answer each questions with a few sentences explaining the answer. These are essay review questions.

1. Use the information for the isotopes of element X to calculate the average atomic mass of X, and identify the element.

(Please see attached document to see the chart that goes with this question)

2. Cynthia and Jackie both draw the Lewis structure for F2 as shown below. Which drawing is correct? Explain.

Imported Asset Cynthia’s Drawing Imported Asset Jackie’s Drawing

3. Which functional groups are involved in an amino acid?