Chemical Bonding (Ionic and Covalent)

What is meant by the term ionic lattice?

• made of positive and negative ions that are alternating and in a regular arrangement

• only made of positive ions in a regular arrangement

• only made of negative ions in a regular arrangement

• made of positive and negative ions in a random arrangment

Which of the following is not a typical physical property of ionic compounds?

• High melting point and high boiling point

• Conducts electricity when molten or aqueous

• Dissolves in water

• Conducts electricity when solid

Draw a dot-and-cross diagram of sodium chloride, showing only the outer shells

Draw a dot-and-cross diagram to show covalent bonding in hydrogen chloride, showing only the outer shells

Which of the following best describes covalent bonding?

• Between metal and non-metal

• Sharing of electrons

• Transfer of electrons

• Electrons are free to move

In terms of structure and bonding, why does hydrogen chloride have low melting point?

• Strong electrostatic attraction between positive ions and negative ions

• Strong electrostatic forces of attraction, a lot of energy is needed to overcome these forces

• Weak intermolecular forces, little energy is needed to overcome these forces

• Strong electrostatic attraction between positive ions and sea of electrons

In terms of structure and bonding, why does hydrogen chloride have poor electrical conductivity?

• Hydrogen chloride has a simple molecular structure, so it has no free moving electrons

• Hydrogen chloride is a giant covalent compound, so it has no free moving electrons

• Hydrogen chloride has an ionic lattice, so it has no free moving electrons

• Hydrogen chloride has metallic bonding, so there are free moving electrons