The transferring of electrons between a metal and a non metal
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What is Covalent Bonding?
The sharing of of electrons between non metals to form single, double, triple bonds
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What are features of solid ionic bonds?
High melting points, Lattice, soluble in water, Conducts electricity in molten or solution form, no free electrons
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What is metallic bonding?
Metallic bonding is the strong attraction between closely packed positive metal ions and a 'sea' of delocalised electrons.
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What is a Diatomic molecule?
When two atoms join together to create a stable outer shell
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What is the aim of bonding?
To create a stable outer shell
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How many atoms does an element contain?
They contain 1 atom
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How many atoms does an molecule contain?
They contain Multiple
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What are simple covalent compounds?
Covelent compounds with weak inter-molecular forces between molecules that can easily be broken down
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List some properties of simple covalent compounds
Liquid or gasses at room temps, insoluble in water, cannot conduct electricity, low melting and boiling points
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What are Giant covelent bonds?
Covalent bonds with high melting and boiling points as a result of lots of weak inter-molecular forces of attraction, so more energy is required to break them down
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What state are Giant covalent bonds normally found in?
Solid
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What two elements are Giant covalent bonds usually found in?
Silicon and Carbon!
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How does metallic bonding work?
The free electrons act as a "glue" which holds the metal atoms together
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Where do the free electrons come from?
The outer shell of all the atoms are allowed to become free
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Why can graphite conduct electricity?
As they have delocalised electrons which act as free electrons like in metals
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How are high density polymers produced?
Under high pressures and a catalyst
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What is a high density polymers structure?
Crystalline
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What are the properties of a high density polymer?
High density, forces of attraction between polymer molecules are strong, Stronger material, High melting point
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How are low density polymers formed?
Under very high pressure with traces of oxygen
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How are low density polymers structured?
branch polymer chain
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List properties of low density polymers
Low density, weaken forces of attraction, less strong and lower melting point
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What is a thermosoftening polymer?
A polymer that will soften easily and reset when cool down
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List some examples of thermosoftening polymers
Plastic bags, Phone cases ...
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What is a thermosetting ploymer?
A polymer that does not melt when heated with strong cross links that cannot be reformed when broken
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List some examples of thermosetting polymers
Pc case, Microwave...
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What is nanoscience?
The science of very small particles
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Why is nano science so effective?
Because they have large surface areas
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Other cards in this set
Card 2
Front
What is Covalent Bonding?
Back
The sharing of of electrons between non metals to form single, double, triple bonds
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