Use the periodic table to find the two ions (positive ion and negative ion) for each compound. Then write the formula. Remember, the overall charge of the compound is neutral (zero charge). Thus, the overall positive charge must be equal to the overall negative charge. Example: calcium chloride 2+ Ca C (These two charges are not the same, but 2 chloride ions will give an overali negative charge of -2. The positive ion already has a + 2 charge.) Ca²+ Cl₂ Therefore, CaCl₂ is the answer. Name 1) sodium chloride ex. 2) potassium bromide 3) calcium oxide 4) magnesium sulfide Ca²+ CI CI Positive Ion Na+ Count up the total charge. +2, -1, -1 This adds up to zero!! Negative Ion CI Formula NaCl K Br
Use the periodic table to find the two ions (positive ion and negative ion) for each compound. Then write the formula. Remember, the overall charge of the compound is neutral (zero charge). Thus, the overall positive charge must be equal to the overall negative charge. Example: calcium chloride 2+ Ca C (These two charges are not the same, but 2 chloride ions will give an overali negative charge of -2. The positive ion already has a + 2 charge.) Ca²+ Cl₂ Therefore, CaCl₂ is the answer. Name 1) sodium chloride ex. 2) potassium bromide 3) calcium oxide 4) magnesium sulfide Ca²+ CI CI Positive Ion Na+ Count up the total charge. +2, -1, -1 This adds up to zero!! Negative Ion CI Formula NaCl K Br
Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter3: Bonding: General Concepts
Section: Chapter Questions
Problem 134AE
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