Question 1

Which of the following best explains why a solution of sodium chloride conducts electricity, while solid sodium chloride does not?

Accepted Answer

In solution, the Na+ and Cl− ions are free to move, allowing the flow of electric current.

Question 2

According to the octet rule, what is the most likely ion formed by a sulfur atom?

Accepted Answer

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

Question 3

Which of the following ions has the same electron configuration as neon ($$\mathrm{Ne}$$)?

Accepted Answer

$$\mathrm{Mg$$^{2+}$$}$$

Question 4

A patient is diagnosed with hypokalemia (low potassium levels). Which ion is deficient in their body fluids?

Accepted Answer

$$\mathrm{K$$^{+}$$}$$

Question 5

Which of the following correctly describes the process by which a chlorine atom becomes a chloride ion?

Accepted Answer

It gains one electron to achieve a noble gas configuration.

Question 6

What is the correct formula for the ionic compound formed between calcium ions and phosphate ions?

Accepted Answer

$$\mathrm{Ca_3$(PO_4$)_2}$$

Question 7

Which of the following statements about transition metals is TRUE?

Accepted Answer

Transition metals can form cations with more than one possible charge.

Question 8

What is the name of the compound $$\mathrm{$$FeCl_3$$}$$ using the Stock system?

Accepted Answer

Iron(III) chloride

Question 9

Which of the following polyatomic ions is correctly paired with its formula?

Accepted Answer

Sulfate ion: $$\mathrm{SO_4$^{2-}}$$

Question 10

A solution contains dissolved $$\mathrm{NaOH}. $$Which ion is responsible for the basic nature of the solution?

Accepted Answer

$$\mathrm{OH$$^{-}$$}$$

Question 11

Which of the following best explains why ionic compounds have high melting points?

Accepted Answer

Strong electrostatic forces hold the ions together in a rigid lattice.

Question 12

What is the correct name for $$\mathrm{Ca(OH)_2}$$?

Accepted Answer

Calcium hydroxide

Question 13

Which of the following ions is most likely to be found in the hemoglobin of red blood cells, playing a role in oxygen transport?

Accepted Answer

$$\mathrm{Fe$$^{2+}$$}$$

Question 14

Which of the following formulas represents a compound that is neutral overall?

Accepted Answer

$$\mathrm{$$MgCl_2$$}$$

Question 15

Which of the following is the correct electron configuration for a $$\mathrm{N$$^{3-}$$}$$ ion?

Accepted Answer

$$1s^2$$\ $$2s^2$$\ $$2p^6$$

Question 16

A compound is formed from aluminum ions and sulfate ions. What is its correct formula?

Accepted Answer

$$\mathrm{Al_2$(SO_4$)_3}$$

Question 17

Which of the following best describes the difference between a cation and an anion?

Accepted Answer

A cation is positively charged due to loss of electrons, while an anion is negatively charged due to gain of electrons.

Question 18

Which of the following is the correct name for $$\mathrm{NH_4NO_3}$$?

Accepted Answer

Ammonium nitrate

Question 19

Which of the following best explains why noble gases do not form ions easily?

Accepted Answer

They already have a stable octet of electrons and neither gain nor lose electrons easily.

Question 20

A sample of magnesium reacts with hydrochloric acid to produce a solution that conducts electricity. Which ions are present in the solution?

Accepted Answer

$$\mathrm{Mg$$^{2+}$$}$$ and $$\mathrm{Cl$$^{-}$$}$$

Chapter 3: Ionic Compounds – Structured Study Notes for GOB Chemistry

Study Guide - Practice Questions