5 - Types of crystalline substances

What are the 4 categories that crystalline substances can be divided into?

What are the 4 categories that crystalline substances can be divided into?

• metals

• ionic compounds

• simple covalent substances

• giant covalent substances

Describe the type of bonding within metals, ionic compounds, molecular/simple covalent and macromolecules (giant) covalent

• metals: metallic bonding

• ionic compound: ionic bonding

• simple covalent: covalent within molecules, intermolecular forces between molcules

• giant covalent: covalent bonds, graphite has intermolecular forces between layers

Describe the electrical conductivity within metals, ionic compounds, molecular/simple covalent and macromolecules (giant) covalent

• metals can conduct electricity when molten or in aqueous solution, not solid

• ionic compounds same as metals

• simple molecules can't

• macromolecules: graphite can

Describe the melting point within metals, ionic compounds, molecular/simple covalent and macromolecules (giant) covalent

• metals: generally high melting points

• ionic compounds: very high

• simple covalent: low

• macromolecules: high

Describe the solubility in water of metals, ionic compounds, molecular/simple covalent and macromolecules (giant) covalent

• metals: no but react w water

• ionic compounds: generally soluble

• simple covalent: mostly insoluble

• macromolecules: insoluble