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Chemical Nomenclature for Polyatomic Ions Quiz

#1

Which of the following is the formula for the nitrate ion?

NO3-
Explanation

Nitrate ion has one nitrogen atom and three oxygen atoms with a single negative charge.

#2

What is the chemical formula for the carbonate ion?

CO3^2-
Explanation

Carbonate ion consists of one carbon atom and three oxygen atoms with a double negative charge.

#3

What is the formula for the hydroxide ion?

OH-
Explanation

Hydroxide ion comprises one oxygen atom and one hydrogen atom with a single negative charge.

#4

Which of the following is the chemical formula for the sulfate ion?

SO4^2-
Explanation

Sulfate ion contains one sulfur atom and four oxygen atoms with a double negative charge.

#5

Which of the following is the formula for the phosphate ion?

PO4^3-
Explanation

Phosphate ion comprises one phosphorus atom and four oxygen atoms with a triple negative charge.

#6

What is the chemical formula for the cyanide ion?

CN-
Explanation

Cyanide ion consists of one carbon atom and one nitrogen atom with a single negative charge.

#7

What is the chemical formula for the permanganate ion?

MnO4-
Explanation

Permanganate ion comprises one manganese atom and four oxygen atoms with a single negative charge.

#8

Which of the following is the formula for the oxalate ion?

C2O4^2-
Explanation

Oxalate ion contains two carbon atoms and four oxygen atoms with a double negative charge.

#9

What is the chemical formula for the hypochlorite ion?

ClO-
Explanation

Hypochlorite ion consists of one chlorine atom and one oxygen atom with a single negative charge.

#10

Which of the following is the formula for the perchlorate ion?

ClO4-
Explanation

Perchlorate ion contains one chlorine atom and four oxygen atoms with a single negative charge.

#11

What is the chemical formula for the chlorate ion?

ClO3-
Explanation

Chlorate ion comprises one chlorine atom and three oxygen atoms with a single negative charge.

#12

Which of the following is the formula for the chlorite ion?

ClO2-
Explanation

Chlorite ion contains one chlorine atom and two oxygen atoms with a single negative charge.

#13

What is the chemical formula for the chromate ion?

CrO4^2-
Explanation

Chromate ion contains one chromium atom and four oxygen atoms with a double negative charge.

#14

What is the chemical formula for the sulfate ion?

SO4^2-
Explanation

Sulfate ion comprises one sulfur atom and four oxygen atoms with a double negative charge.

#15

Which of the following is the formula for the sulfite ion?

SO3^2-
Explanation

Sulfite ion contains one sulfur atom and three oxygen atoms with a double negative charge.

#16

What is the chemical formula for the ammonium ion?

NH4+
Explanation

Ammonium ion consists of one nitrogen atom and four hydrogen atoms with a single positive charge.

#17

Which of the following is the formula for the chromate ion?

Cr2O7^2-
Explanation

Chromate ion contains two chromium atoms and seven oxygen atoms with a double negative charge.

#18

What is the chemical formula for the hydrogen carbonate ion?

HCO3-
Explanation

Hydrogen carbonate ion comprises one hydrogen atom, one carbon atom, and three oxygen atoms with a single negative charge.

#19

Which of the following is the formula for the acetate ion?

CH3COO-
Explanation

Acetate ion consists of two carbon atoms, three hydrogen atoms, and two oxygen atoms with a single negative charge.

#20

What is the chemical formula for the bisulfate ion?

HSO4-
Explanation

Bisulfate ion consists of one hydrogen atom, one sulfur atom, and four oxygen atoms with a single negative charge.

#21

Which of the following is the formula for the dichromate ion?

Cr2O7^2-
Explanation

Dichromate ion contains two chromium atoms and seven oxygen atoms with a double negative charge.

#22

What is the chemical formula for the thiosulfate ion?

S2O3^2-
Explanation

Thiosulfate ion comprises two sulfur atoms and three oxygen atoms with a double negative charge.

#23

What is the chemical formula for the peroxide ion?

O2^2-
Explanation

Peroxide ion consists of two oxygen atoms with a double negative charge.

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