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| Q. |
Which of these have a negative electrical charge? |
| A. | calcium |
| B. | magnesium |
| C. | sodium |
| D. | chloride |
| Answer» D. chloride | |
| Explanation: calcium and magnesium ions are atoms having a positive electrical charge, as do sodium and potassium ions. ions of the same charge can be exchanged. | |
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