Chemistry Additional- Covalent bonding 0.0 / 5 ? ChemistryStructure and bondingGCSEAQA Created by: HarrietCreated on: 01-12-14 18:57 What is covalent bonding? Where atoms share electrons so they get a full outer shell 1 of 8 What are two types of covalent substances? Simple molecular substances and giant covalent structures 2 of 8 What do chlorine, oxygen and water all have in common? They are simble molecular substances and have very weak intermolecular forces. 3 of 8 What is an effect of weak intermolecular forces? Low melting and boiling points as the molecules are easily parted from each other. 4 of 8 Can molecular substances conduct electricity? Why? No because there are no ions so there's no electrical charge 5 of 8 What are diamond, silicon dioxide and graphite otherly known as? Macromolecules 6 of 8 What are the boiling and melting points like for macromolecules? Why? They are very high because the atoms are bonded to each other by strong covalent bonds 7 of 8 Why don't giant covalent structures conduct electricity? Which is the exception? Because there are no charged ions. Graphite however does conduct electricity when molten. 8 of 8
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