bonding

• what is metallic bonding between?

  Metal + Metal
• What is ionic bonding between?

  Metal and non metal
• State 2 features of metallic bondin?

  delocalised electrons

  strong electrostatic forces
• describe alloys

  pure metals mixes with other metals with different sizes atoms this distorts the layers and prevents them from sliding this makes alloys harder to bend/shape
• describe giant ionic lattice

  strong electrostatic forces that act in all directions between oppositely charged ions
• When can ionic bonds conduct electricity?

  when molten or aqueous because ions are free to move
• does ionic bonds have high or low melting and boiling point?

  high because there’s lots of energy needed to overcome electrostatic forces
• 2 features of ionic bonding?

  Electrostatic forces

  oppositely charged forces - metals lose electrons to become positive
• what is covalent bonding between?

  non-metal and non-metal
• does covalent bonding have high or low melting/boiling points and why?

  low melting points due to the weak intermolecular forces
• draw a dot and cross diagram for oxygen

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• draw a dot and cross diagram for water 


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• draw a dot and cross diagram for nitrogen 


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• draw a dot and cross diagram for chlorine 


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• draw a dot and cross diagram for ammonia 


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• draw a dot and cross diagram for methane


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• draw a dot and cross diagram for hydrogen chloride


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• what are the properties of simple covalent structures?

  Low melting/boiling points, dont conduct electricity because they don’t have any delocalised electrons, formed by sharing electrons.