11 Module 1 Inquiry Question 4 Progress Quiz

What forms when metal atoms come together and their outer shell electrons move more freely throughout a collection of cations?

• Covalent bonds

• Ionic bonds

• Metallic bonds

• Hydrogen bonds

Answer explanation

Metallic bonds form when metal atoms come together, and their outer shell electrons move more freely throughout a collection of cations.

What is the force that holds metallic bonds together?

• Weak gravitational force

• Strong magnetic force

• Strong electrostatic force of attraction

• Weak van der Waals force

Answer explanation

The correct force that holds metallic bonds together is the strong electrostatic force of attraction between positively charged metal ions and delocalized electrons.

What are the particles that make up the lattice in metallic bonds?

• Anions and protons

• Cations and neutrons

• Cations and free electrons

• Anions and free electrons

Answer explanation

In metallic bonds, the lattice is made up of cations (positively charged ions) and free electrons. The positive cations are surrounded by a 'sea' of delocalized electrons.

Why do metals typically have high melting points (MP) and boiling points (BP)?

• Due to weak electrostatic attraction between cations and electrons

• Because metals are naturally cooler substances

• Due to strong electrostatic attraction between cations and electrons

• Because of the high density of metal atoms

Answer explanation

Metals typically have high melting and boiling points due to the strong electrostatic attraction between cations and electrons.

What allows electrons to move freely through the lattice to carry charge, giving a material good electrical conductivity?

• The rigidity of the lattice

• The immobility of electrons

• The free movement of electrons through the lattice

• The attraction between electrons and cations

Answer explanation

Electrons can move freely through the lattice to carry charge, providing good electrical conductivity.

What property is due to the constant movement of electrons which reflect light?

• Opacity

• Brittleness

• Hardness

• Lustre

Answer explanation

Lustre is the property due to the constant movement of electrons which reflect light, giving a shiny appearance.

What allows the layers of positive ions to slide over each other in a material, contributing to malleability and ductility?

• The static nature of the lattice

• The repulsion between cations and electrons

• The attraction between cations and the electrons in all directions

• The inability of electrons to move

Answer explanation

The attraction between cations and the electrons in all directions allows the layers of positive ions to slide over each other, contributing to malleability and ductility.

What forms when oppositely charged ions are electrostatically bonded?

• Covalent bonds

• Metallic bonds

• Ionic bonds

• Hydrogen bonds

Answer explanation

Oppositely charged ions form ionic bonds through electrostatic attraction, not covalent, metallic, or hydrogen bonds.

What type of force is responsible for the attraction between oppositely charged cations and anions in an ionic bond?

• Gravitational force

• Weak nuclear force

• Electromagnetic force

• Strong electrostatic force

Answer explanation

The correct type of force responsible for the attraction between oppositely charged cations and anions in an ionic bond is the strong electrostatic force.

Why do ionic compounds have high melting and boiling points?

• Because they have weak forces of attraction between molecules

• Because they have covalent bonds that are easy to break

• Because a great deal of energy is needed to overcome the strong force of attraction between cations and anions

• Because they are made of molecules with low atomic weights

Answer explanation

Ionic compounds have high melting and boiling points because a great deal of energy is needed to overcome the strong force of attraction between cations and anions.