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Chloride ions have a charge of 1-. Since the charge on an Mg ion is 2+, the formula unit of Magnesium Chloride is MgCl2. There are 2 chloride ions for each Mg ion.
Each formula unit dissociates into two sodium ions and one sulfate ion, for a total of 3.
Here exist: 1 ion Mg+ and ion (CO3)-.
If there were a chain of 20K and Br atoms attached to each other, somehow, then the formula would be written as K20Br20. Since only one K+ ion attaches to one Br- ion, the formula is written as KBr, regardless of how many are there.
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Chloride ions have a charge of 1-. Since the charge on an Mg ion is 2+, the formula unit of Magnesium Chloride is MgCl2. There are 2 chloride ions for each Mg ion.
positive ion - magnesium(cation) negative ion-chloride (anion)
The ions should form CaCl2 because the two chlorine atoms each take an electron from calcium to form the chloride ion Cl-, and the calcium becomes Ca2+ ion.
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Each formula unit dissociates into two sodium ions and one sulfate ion, for a total of 3.
The gallium ion is Ga3+.
Here exist: 1 ion Mg+ and ion (CO3)-.
The formula for the oxide ion is O2-, and the formula for the nitrate ion is NO3-.
If there were a chain of 20K and Br atoms attached to each other, somehow, then the formula would be written as K20Br20. Since only one K+ ion attaches to one Br- ion, the formula is written as KBr, regardless of how many are there.
1
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There is only one chloride ion in the formula unit of sodium chloride.