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

Study Guide - Practice Questions