Question 1

Which statement best explains why ionic compounds have high melting and boiling points?

Accepted Answer

Because the ions are bound by strong ionic bonds in a crystal lattice, requiring high energy to separate them.

Question 2

What happens to the size of an atom when it becomes a cation?

Accepted Answer

It becomes smaller than its parent atom.

Question 3

Which of the following best describes the process of forming an anion?

Accepted Answer

An atom gains electrons and becomes negatively charged.

Question 4

Which of the following is the correct formula for the ionic compound formed between magnesium and nitrogen?

Accepted Answer

$$Mg_3N_2$$

Question 5

Why do ionic compounds conduct electricity when dissolved in water but not in their solid state?

Accepted Answer

Because the ions are free to move in solution, allowing electrical current to pass.

Question 6

Which of the following is NOT a property of ionic compounds?

Accepted Answer

They are usually gases at room temperature.

Question 7

What is the main driving force for the formation of ionic bonds between atoms?

Accepted Answer

The desire to achieve a full outer shell of electrons, becoming isoelectronic with noble gases.

Question 8

Which of the following best describes the arrangement of ions in a solid ionic compound?

Accepted Answer

Arranged in a three-dimensional crystal lattice with alternating cations and anions.

Question 9

Which of the following equations represents the neutralization reaction between hydrochloric acid and sodium hydroxide?

Accepted Answer

$$NaOH + HCl \rightarrow NaCl + H_2O$$

Question 10

If a sodium atom ($$Na) $$reacts with a chlorine atom ($$Cl$$), what is the resulting ionic compound and its formula?

Accepted Answer

Sodium chloride, $$NaCl$$

Question 11

Which of the following is true about the Lewis dot structure for a chloride ion ($$Cl^-$$)?

Accepted Answer

It has eight dots around the symbol and a negative charge.

Question 12

Which of the following best describes an electrolyte?

Accepted Answer

A compound that conducts electricity in solution due to the movement of ions.

Question 13

What is the correct formula for the ionic compound formed between potassium ($$K^+) $$and sulfur ($$S^{2-}$$)?

Accepted Answer

$$K_2S$$

Question 14

Which statement correctly describes the change in electron configuration when a magnesium atom forms a $$Mg^{2+}$$ ion?

Accepted Answer

It loses two electrons to become isoelectronic with neon.

Question 15

Which of the following is a property that makes ionic compounds brittle?

Accepted Answer

The alignment of like charges upon application of force, causing repulsion and crystal breakage.

Question 16

Which of the following is the correct Lewis structure for the ions in $$MgBr_2$$?

Accepted Answer

$$Mg^{2+}$$ and $$2[Br^-]$$

Question 17

Which of the following is NOT a type of ionic compound based on the ions they contain?

Accepted Answer

Alloy

Question 18

What is the result of the following reaction: $$H^+ + H_2O \rightarrow$$ ?

Accepted Answer

$$H_3O^+$$

Question 19

Which of the following best explains why ionic compounds are solid at room temperature?

Accepted Answer

Because their ions are arranged in a stable, three-dimensional crystal lattice.

Ionic Bonds: Structure, Formation, and Properties

Study Guide - Practice Questions