Ionic Chemical Bonds Review

Which compound would you expect to be a solid with a high melting point?

• CO₂

• H₂O

• Na₂S

• C₂H₅OH

Answer explanation

Na₂S is an ionic compound, which typically has a high melting point due to strong electrostatic forces between ions. In contrast, CO₂ and C₂H₅OH are molecular compounds with weaker intermolecular forces, and H₂O, while having hydrogen bonding, does not match Na₂S's melting point.

Tags

NGSS.HS-PS1-3

Which type of compound typically has a crystalline structure?

• Covalent

• Ionic

• Metallic

Answer explanation

Ionic compounds typically form a crystalline structure due to the strong electrostatic forces between positively and negatively charged ions, resulting in a well-ordered arrangement. This is a key characteristic that distinguishes them from covalent and metallic compounds.

Which of the following properties is characteristic of ionic compounds?

• Poor solubility in water

• Conduct electricity when solid

• High melting and boiling points

• Gaseous at room temperature

Answer explanation

Ionic compounds are characterized by high melting and boiling points due to the strong electrostatic forces between ions. This property distinguishes them from other types of compounds.

Which of the following compounds is most likely to conduct electricity when dissolved in water?

• H₂O

• NaCl

• CO₂

• CH₄

Answer explanation

NaCl (sodium chloride) dissociates into Na+ and Cl- ions in water, allowing it to conduct electricity. In contrast, H2O, CO2, and CH4 do not produce ions in solution, making them poor conductors.

Ionic compounds are formed from the attraction between:

• Two nonmetals

• Two metals

• A metal and a nonmetal

Answer explanation

Ionic compounds are formed from the electrostatic attraction between a metal and a nonmetal. Metals lose electrons to become positively charged ions, while nonmetals gain electrons to become negatively charged ions, resulting in ionic bonds.

Select the ionic compound from the options below:

• KCl

• H₂O

• C₂H₅OH

• N₂

• MgBr₂

Answer explanation

Ionic compounds are formed from the electrostatic attraction between cations and anions. KCl (potassium chloride) and MgBr2 (magnesium bromide) are both ionic compounds, while H2O, C2H5OH, and N2 are not.

Tags

NGSS.HS-PS1-3

Which of the following is an ionic compound?

• CH₄

• Na₂O

• CO

• H₂S

Answer explanation

Na₂O is an ionic compound formed from sodium (Na) and oxygen (O) ions. In contrast, CH₄, CO, and H₂S are covalent compounds, where atoms share electrons rather than transferring them.

Which type of chemical bond is formed by the electrostatic force between a positive ion and a negative ion?

• Cooperative

• Covalent

• Ionic

• Metallic

Answer explanation

The electrostatic force between a positive ion and a negative ion forms an ionic bond. This type of bond occurs when electrons are transferred from one atom to another, resulting in charged ions that attract each other.

Tags

NGSS.HS-PS1-3

Which type of chemical bond requires the transfer of electrons between atoms?

• Covalent

• Cooperative

• Ionic

• Metallic

Answer explanation

Ionic bonds involve the transfer of electrons from one atom to another, resulting in the formation of charged ions. This is in contrast to covalent bonds, where electrons are shared, and metallic bonds, which involve a sea of delocalized electrons.

Ionic bonds are formed when:

• electrons are transferred from one atom to another, creating oppositely charged ions that attract each other.

• atoms share electrons equally between them.

• atoms share electrons unequally, resulting in partial charges.

• atoms combine to form molecules without any electron transfer.

Answer explanation

Ionic bonds occur when electrons are transferred from one atom to another, resulting in oppositely charged ions that attract each other. This distinguishes ionic bonds from covalent bonds, where electrons are shared.