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Ions and Electrical Charge
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Grade Level
Physical Science with Earth and Science
9.23 Ions and Electrical Charge
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A 2+ ion and a 1- ion attract. Why are two 1- ions often needed to make a neutral formula unit with one 2+ ion?
A
Two 1- ions make the positive ion lose its protons.
B
A 2+ ion cannot attract a 1- ion at all.
C
Two 1- charges total 2-, which balances the 2+ charge.
D
Two negative ions are needed because negative charges do not count fully.
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