| Front | Define ionic bond: |
| Back | Electrostatic force of attraction between oppositely charged ions in a giant ionic lattice caused by electron transfer. |
| Question | Describe the 2nd step in free radical substitution: |
| Answer | - Propagation- All propagation steps have a free radical in the reactants and in the products- As the halogen free radical (e.g. Cl) is regenerated, it can react with several more alkane molecules in a chain reaction |
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| Front | What does the strength of a metallic bond depend on? |
| Back | - Charge on the ion -> greater the charge, greater the number of delocalised electrons in sea so stronger the electrostatic forces of attraction between positive metal ions (in giant metallic lattice) and delocalised electrons, which require more energy to overcome and so the stronger the metallic bond- Size of the ion -> smaller the ion, closer the electrons are to positive nucleus, so stronger electrostatic attraction that requires lots of energy to overcome, so stronger the metallic bond- Delocalised electrons extend throughout solid so no individual bonds to break so metals tend to be strong |