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| Frage | Antworten |
| definition of a metallic bond? | the force of attraction between the positive metal ions and the delocalised outer electrons |
| definition of a ionic bond? | the force of attraction between 2 oppositely charged ions |
| definition of a covalent bond? | the force of attraction between a shared pair of electrons and 2 positive nuclei |
| why do simple molecular substances have (molecules) have low melting and boiling points? and what does this explain? | they have weak intermolecular forces between their molecules, this explains why many elements are gases at room temp |
| giant structures..... | DO NOT HAVE WEAK INTERMOLECULAR FORCES! |
| why do metals conduct? | because they have delocalised electrons |
| why does ionic compounds and ionic solutions conduct? | because they have free moving ions that carry charge when voltage is applied. |
| why dont ionic solids conduct? | because the ions are held in place by strong forces of attraction. |
| what are metals malleable and ductile? | they are made up of layers of positive ions that can slide over each other when a force is applied. |
| giant ionic typical properties? | particles present- + ions -ions type of bonding- strong ionic bonds melting point- high conduct electricity- not as a solid but molten or in a solution. |
| giant covalent typical properties? | particles present- atoms type of bonding- strong ionic bonds melting point- high electricity conductivity- not at all (except graphite) |
| simple molecular typical properties? | particles present- molecules type of bonding- weak intermolecular forces melting point- low conduct electricity- no |
| giant metallic typical properties? | particles present- +ions, delocalised electrons type of bonding- strong metallic bonds melting point- high electricity conductivity- solid yes, molten or in solution yes |
| definition of an atom? | a particle with an equal amount of protons and electrons |
| definition of a molecule? | small group of atoms bonded together |
| definition of an ion? | an atom that has lost or gained electrons- it is a charged particle |
| definition of an element? | a pure substance made up of one type of atom |
| definition of a compound? | a substance made up of two or more elements chemically bonded together |
| definition od a cation and an anion? | cation- positively charged ion, lost an electron anion- negatively charged ion, gained an electron |
| delocalised electrons? | electrons that are not fixed in position; they are free to move aroubd |
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