Multiple Choice
Which of the following polyatomic ions has a 3- ionic charge?
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3. Chemical Reactions
Polyatomic Ions
Multiple Choice
Which of the following is the correct chemical formula for the iodate ion?
A
I2O3-
B
IO2-
C
IO4-
D
IO3-
Verified step by step guidance1
Understand that the iodate ion is a polyatomic ion containing iodine and oxygen atoms with a specific charge.
Recall that the iodate ion is derived from iodine and oxygen, and its chemical formula is commonly known in chemistry as IO3-.
Analyze the options given: I2O3- suggests two iodine atoms, which is not typical for the iodate ion; IO2- corresponds to the iodite ion; IO4- corresponds to the periodate ion.
Recognize that the iodate ion has one iodine atom bonded to three oxygen atoms and carries a -1 charge, which matches the formula IO3-.
Conclude that the correct chemical formula for the iodate ion is IO3-.
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