Question 1

Which of the following ions is formed when an atom of fluorine gains one electron?

Accepted Answer

F$$^{-}$$

Question 2

What is the typical ionic charge for elements in group 2 of the periodic table?

Accepted Answer

$$+2$$

Question 3

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

Accepted Answer

$$SO_4$$^{2-}$$

Question 4

An atom of sodium (Na) loses one electron to form an ion. What is the charge and electron configuration of the resulting ion?

Accepted Answer

Charge: $$+1$$, Configuration: $$1s^2$$ $$2s^2$$ $$2p^6$$

Question 5

Which of the following polyatomic ions is commonly found in household cleaning products and has the formula $$NH_4$$^+$$?

Accepted Answer

Ammonium ion

Question 6

What is the charge on the ion formed by magnesium (Mg) when it achieves a noble gas configuration?

Accepted Answer

$$+2$$

Question 7

Which of the following ions is a polyatomic ion with a $$-1$$ charge and is commonly found in fertilizers?

Accepted Answer

Nitrate ion ($$NO_3$$^-$$)

Question 8

Which statement best explains why atoms in group 1 of the periodic table form ions with a $$+1$$ charge?

Accepted Answer

They have one valence electron and lose it to achieve a full outer shell.

Question 9

Which of the following ions is NOT a polyatomic ion?

Accepted Answer

Chloride ion ($$Cl^-)$$

Question 10

A patient receives an IV solution containing $$Na^+$$ and $$Cl^-. $$What type of compound is this, and what is its name?

Accepted Answer

Ionic compound, sodium chloride

Question 11

Which of the following ions is formed when an atom of oxygen gains two electrons?

Accepted Answer

O$$^{2-}$$

Question 12

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

Accepted Answer

$$CH_3COO^-$$

Question 13

Why is it difficult to predict the charge of transition metal ions?

Accepted Answer

Transition metals can lose different numbers of electrons, forming ions with various charges.

Question 14

Which of the following ions is commonly found in baking soda?

Accepted Answer

Hydrogen carbonate ion ($$HCO_3$$^-$$)

Question 15

A calcium atom loses two electrons to form an ion. What is the charge of the resulting ion?

Accepted Answer

$$+2$$

Question 16

Which of the following ions is formed when a nitrogen atom gains three electrons?

Accepted Answer

N$$^{3-}$$

Question 17

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

Accepted Answer

$$PO_4$$^{3-}$$

Question 18

Which of the following ions is commonly found in acid rain and has the formula $$SO_4$$^{2-}$$?

Accepted Answer

Sulfate ion

Question 19

Which of the following ions is formed when a chlorine atom gains one electron?

Accepted Answer

Cl$$^{-}$$

Question 20

Which of the following ions is commonly found in IV solutions and helps regulate pH in the body?

Accepted Answer

Hydronium ion ($$H_3O^+)$$

Formation of Ions, Ionic Compounds, and Polyatomic Ions

Study Guide - Practice Questions