Chemical Bonds and Bulk Properties — OCR GCSE Combined Science B J260
OCR GCSE Combined Science B · J260
Chemical Bonds and Bulk Properties
What you need to know
Explain how the types of bond in a material, the strength of those bonds compared with intermolecular forces, and the way the bonds are arranged account for its bulk properties, such as hardness, brittleness, flexibility, strength, melting point, ease of reshaping, and electrical and thermal conductivity.
Understand that bulk properties arise from the structure as a whole, rather than belonging to individual constituent atoms.
Recall that carbon has the ability to form four stable covalent bonds.
Explain how the vast array of natural and synthetic organic compounds is possible due to carbon's capacity to form families of compounds, chains, and rings.
Describe the nature and arrangement of chemical bonds in polymers, relating these structures to properties like strength, flexibility, stiffness, hardness, and solid melting point.
Describe the nature and arrangement of chemical bonds within giant covalent structures.
Explain the distinct properties of diamond and graphite, including melting point, hardness, and (for graphite) electrical conductivity and lubricating action, in terms of their structures and bonding.
Represent three-dimensional chemical structures (such as carbon allotropes) accurately in two dimensions, and vice versa.
Describe and systematically compare the nature and arrangement of chemical bonds found in ionic compounds, simple molecules, giant covalent structures, polymers, and metals.
