What is the chemical formula of chloride ion?

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Multiple Choice

What is the chemical formula of chloride ion?

Explanation:
Chlorine atoms gain one extra electron to fill their outer shell, becoming negatively charged ions called chloride. The symbol for this ion is Cl^-—chlorine with a minus sign showing its single negative charge. The other possibilities aren’t the chloride ion: Cl2 is just a molecule of two chlorine atoms, while ClO- and ClO4- are oxyanions (they include oxygen) with different numbers of atoms and different charges. So the chloride ion’s formula is Cl^-.

Chlorine atoms gain one extra electron to fill their outer shell, becoming negatively charged ions called chloride. The symbol for this ion is Cl^-—chlorine with a minus sign showing its single negative charge. The other possibilities aren’t the chloride ion: Cl2 is just a molecule of two chlorine atoms, while ClO- and ClO4- are oxyanions (they include oxygen) with different numbers of atoms and different charges. So the chloride ion’s formula is Cl^-.

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