Properties of covalent substances
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I can describe some different structures that non-metal atoms can form using covalent bonding and describe the properties of covalent compounds.
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Typical atomic radii, and bond length, are in the order of 10⁻¹⁰m.
Non-metal elements and non-metal compounds form covalent structures.
Simple covalent substances have no free moving charge carriers so cannot conduct electricity (some giant covalent can).
Small molecules are usually gases or liquids with relatively low melting and boiling points.
Giant covalent structures have high melting/boiling points because strong covalent bonds need to be broken.
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