객관식
Which of the following polyatomic ions has an overall charge of -2?
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3. Chemical Reactions
Polyatomic Ions
객관식
Which of the following is the correct chemical formula for the polyatomic ion chlorate?
A
ClO3-
B
ClO2-
C
ClO4-
D
ClO-
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검증된 단계별 안내1
Understand that the problem asks for the chemical formula of the polyatomic ion called chlorate.
Recall that polyatomic ions are ions composed of more than one atom, and their names often indicate the number of oxygen atoms attached to a central atom.
Know the common chlorine-oxygen polyatomic ions: chlorite (ClO2-), chlorate (ClO3-), and perchlorate (ClO4-).
Identify that chlorate specifically corresponds to the ion with three oxygen atoms bonded to chlorine, carrying a negative charge.
Conclude that the correct formula for chlorate is \(\mathrm{ClO_3^-}\).
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