Ch223 prerequisite checkup

CH223 Prerequisite checkup
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Unformatted text preview: WebAssign Sunday, July 17 2011 05:17 PM EDT Logged in as cdbadger@ncsu Log out Home | My Assignments | Grades | Communication | Calendar Notifications | Help | My Options CH_223, section 651, Summer 1 2011 My Assignments Prerequisite checkup (Daily) Crystal Badger CH_223, section 651, Summer 1 2011 Instructor: Kay Sandberg Current Score : 9.25 / 10 Due : Monday, May 23 2011 09:00 PM EDT Ask Your Teacher Extension Requests Print Assignment Question Points 1 2 3 4 5 6 7 8 9 1/1 0.25/1 0.5/0.5 0.5/0.5 0.6/0.6 3.2/3.2 1.4/1.4 0.2/0.2 1.6/1.6 Total 9.25/10 (92.5%) Description This assignment is to help you see if you have retained important knowledge from your general chemistry course. Instructions If you did not score 100% on this assignment (or if you scored 100% but you were guessing) you should view the following review presentations: electronic configuration review presentation (click here) formal charge review presentation (click here) hybridization review presentation (click here) Make sure you check the number of submissions for each question type. Click "points" link to see the number of submissions allowed for each question part. If the presentation does not work properly, see the "Troubleshooting" forum for help. Assignment Submission For this assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit or change the answer. Assignment Scoring Your last submission is used for your score. The due date for this assignment is past. Your work can be viewed below, but no changes can be made. Important! Before you view the answer key, decide whether or not you plan to request an extension. Your Instructor may not grant you an extension if you have viewed the answer key. Automatic extensions are not granted if you have viewed the answer key. Request Extension 1. 1/1 points | Previous Answers My Notes Question Part Points Submissions Used 1 2 3 4 0.25/0.25 0.25/0.25 0.25/0.25 0.25/0.25 1/2 1/2 1/2 1/2 1/1 Click here for the review presentation and here for a periodic table. Give the number of: a) protons in an O atom 18 8 b) electrons in a Li atom 23 3 c) electrons in a Cl 1- ion 318 18 d) electrons in a Ca 2+ ion 418 18 Solution or Explanation Proton number is the atomic number. When the atom is neutral, the electron number equals the proton number. For the anion electron number, you add the charge to the atomic number to determine the electron number. For the cation electron number, you subtract the charge from the atomic number the electron number....
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