Diamond and graphite | Starter Quiz | Oak National Academy

The presence of which type of bond is a key feature in giant covalent structures?

• Ionic bonds

• Covalent bonds

• Metallic bonds

Answer explanation

Covalent bonds, involving the sharing of electrons between atoms, are a key feature of giant covalent structures.

Which property is typical of substances with giant covalent structures?

• high melting and boiling points

• conductivity in their solid state

• low melting and boiling points

• soluble in water

Answer explanation

Substances with giant covalent structures typically have high melting and boiling points due to the strong covalent bonds throughout the structure.

What distinguishes a giant covalent structure from a simple molecular structure?

• the type of atoms involved

• the presence of ionic bonds

• the size and regularity of the structure

• their electrical conductivity

• their solubility in water

Answer explanation

Giant covalent structures are distinguished from simple molecular structures by their size and the regular arrangement of atoms.

Which diagram below shows a model of a giant covalent substance?

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Answer explanation

Iron has a giant metallic lattice, nitrogen is a simple molecular substance, and sodium chloride has a giant ionic lattice.

Which properties are typically found in simple molecular substances but not in giant ionic structures?

• high electrical conductivity

• inability to dissolve in water

• low melting and boiling points

• flexibility and malleability

Answer explanation

Simple molecular substances often have low melting and boiling points due to weaker intermolecular forces, unlike the strong ionic bonds in giant ionic structures.

In giant covalent structures, atoms are bonded covalently in a large 3D lattice resulting in high melting and boiling points. Match each part of this sentence to the correct term.

• structure description

• giant covalent

• bonding

• large 3D lattice

• property

• high melting and boiling points

• structure type

• covalent

Answer explanation

"Bonding" refers to covalent as it involves sharing electrons. The "structure type" is giant covalent. The "property" of high melting and boiling points is from strong bonds, and "structure description" is a large 3D lattice.