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For questions 54 thru 56, type the TOTAL number of electrons for the following ions.   Ca++ ______ 55.  O-2 ______                                                           56.  I-  _______

For questions 54 thru 56, type the TOTAL number of electrons for the following ions.   Ca++ ______ 55.  O-2 ______                                                           56.  I-  _______

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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For questions 54 thru 56, type the TOTAL number of electrons for the following ions.

 

  1. Ca++ ______
  2. 55.  O-2 ______                                                          
  3. 56.  I-  _______
Expert Solution
Step 1

54.

Total number of electrons in a Ca++ ion = 18

Total number of electrons in a Ca atom = atomic number of Ca = 20

2 electrons are lost for making Ca++ ion from Ca atom, so Ca++ ion has 18 electrons.

 

55.

Total number of electrons in a O-2 ion = 10

Total number of electrons in a O atom = atomic number of O = 8

2 electrons are accepted for making O-2 ion from O atom, so O-2 ion has 10 electrons.

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