Question 1

Which of the following best describes the difference between ionic and covalent bonds?

Accepted Answer

Ionic bonds involve the transfer of electrons from a metal to a nonmetal, while covalent bonds involve the sharing of electrons between nonmetals.

Question 2

A neutral sodium atom has 11 protons and 11 electrons. What is the electron configuration and charge of the sodium ion formed when it reacts with chlorine?

Accepted Answer

10 electrons, charge $$1+$$

Question 3

Which of the following ions is named correctly?

Accepted Answer

$$\mathrm{Cl}^-$$: chloride ion

Question 4

A sulfur atom has 16 protons and 16 electrons. What is the formula and charge of the ion formed when it gains two electrons?

Accepted Answer

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

Question 5

Which of the following statements about ionic compounds is FALSE?

Accepted Answer

Ionic compounds are formed by sharing electrons between metals and nonmetals.

Question 6

What is the correct formula for the compound formed between magnesium ions ($$\mathrm{Mg}^{2+}) $$and chloride ions ($$\mathrm{Cl}^-$$)?

Accepted Answer

$$\mathrm{MgCl}_2$$

Question 7

A patient is diagnosed with hypokalemia (low potassium levels). Which ion is primarily involved, and what is its charge?

Accepted Answer

$$\mathrm{K}^+$$

Question 8

Which of the following best explains why Group 1A metals form $$1+$$ ions?

Accepted Answer

They have one valence electron, which they lose to achieve a noble gas configuration.

Question 9

What is the correct formula for the ionic compound formed from barium ions ($$\mathrm{Ba}^{2+}) $$and chloride ions ($$\mathrm{Cl}^-$$)?

Accepted Answer

$$\mathrm{BaCl}_2$$

Question 10

Which of the following is a property of ionic compounds that makes them useful in the human body?

Accepted Answer

They regulate and control body fluids by forming ions in solution.

Question 11

A chlorine atom has 17 protons and 17 electrons. What happens when it forms a chloride ion?

Accepted Answer

It gains one electron to form $$\mathrm{Cl}^-$$ with 18 electrons.

Question 12

Which of the following best describes the naming convention for anions formed from nonmetals?

Accepted Answer

The first syllable of the element name followed by 'ide'

Question 13

Which of the following combinations will result in a neutral ionic compound?

Accepted Answer

Two $$\mathrm{Na}^+$$ ions and one $$\mathrm{S}^{2-}$$ ion

Question 14

Which of the following is the correct formula for sodium sulfide?

Accepted Answer

$$\mathrm{Na}_2\mathrm{S}$$

Question 15

A neutral atom of magnesium has 12 protons and 12 electrons. What is the charge on the magnesium ion after it forms an ionic bond?

Accepted Answer

$$2+$$

Question 16

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

Accepted Answer

Strong electrostatic attractions between oppositely charged ions require a large amount of energy to break.

Question 17

Which of the following ions is essential for muscle contraction and is found in dairy products?

Accepted Answer

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

Question 18

A compound is formed from aluminum ions ($$\mathrm{Al}^{3+}) $$and oxide ions ($$\mathrm{O}^{2-}). $$What is the correct formula for this compound?

Accepted Answer

$$\mathrm{Al}_2\mathrm{O}_3$$

Question 19

Which of the following best describes the process by which a nonmetal forms an anion?

Accepted Answer

It gains one or more electrons to achieve a noble gas configuration.

Chapter 6: Ionic and Molecular Compounds – Structure, Formation, and Properties

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