Question 1

Which of the following best describes a polyatomic ion?

Accepted Answer

A tightly bound group of atoms made of multiple elements that possesses an overall charge.

Question 2

What is the correct formula for the nitrate ion?

Accepted Answer

$$\mathrm{NO_3$^-}$$

Question 3

Which of the following ions is the silicon analog of the carbonate ion?

Accepted Answer

$$\mathrm{$$SiO_3$$^{2-}}$$

Question 4

If the formula for the sulfate ion is $$\mathrm{SO_4$^{2-}}$$, what is the formula for the thiosulfate ion, where one oxygen is replaced by a sulfur?

Accepted Answer

$$\mathrm{S_2O_3$$^{2-}$$}$$

Question 5

Which of the following is the correct systematic name for $$\mathrm{CO_3$^{2-}}$$?

Accepted Answer

Carbonate

Question 6

What is the correct name for the polyatomic ion $$\mathrm{PO_4$^{3-}}$$?

Accepted Answer

Phosphate

Question 7

Which of the following ions is a trioxide?

Accepted Answer

$$\mathrm{NO_3$^-}$$

Question 8

What is the correct formula for the cyanate ion?

Accepted Answer

$$\mathrm{OCN^-}$$

Question 9

Which of the following is the correct systematic name for $$\mathrm{IO^-}$$?

Accepted Answer

Hypoiodite

Question 10

A polyatomic ion contains three oxygen atoms and a $$2-$$ charge. Which of the following is most likely its name?

Accepted Answer

Sulfite

Question 11

Which of the following is the correct formula for the permanganate ion?

Accepted Answer

$$\mathrm{$$MnO_4$$^-}$$

Question 12

Which of the following ions is a tetraoxide?

Accepted Answer

$$\mathrm{SO_4$^{2-}}$$

Question 13

What is the correct systematic name for $$\mathrm{$$AsO_4$$^{3-}}$$?

Accepted Answer

Arsenate

Question 14

Which of the following is the correct formula for the hypochlorite ion?

Accepted Answer

$$\mathrm{ClO^-}$$

Question 15

If the base name for a halogen polyatomic ion is 'chlorate', what is the formula for the 'perchlorate' ion?

Accepted Answer

$$\mathrm{$$ClO_4$$^-}$$

Question 16

Which of the following is the correct systematic name for $$\mathrm{PO_3$^{3-}}$$?

Accepted Answer

Phosphite

Question 17

Which of the following ions does NOT follow a predictable pattern and must be memorized?

Accepted Answer

Cyanide

Question 18

What is the correct formula for the thiocyanate ion?

Accepted Answer

$$\mathrm{SCN^-}$$

Question 19

Which of the following is the correct systematic name for $$\mathrm{FO^-}$$?

Accepted Answer

Hypofluorite

Question 20

Which of the following ions is the conjugate base of the acid $$\mathrm{$$HNO_3$$}$$?

Accepted Answer

$$\mathrm{NO_3$^-}$$

Polyatomic Ions: Structure, Naming, and Examples

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