Nano science

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  • Created by: irena4567
  • Created on: 14-12-15 20:28
Hip joints have coasting of nano particles to make it last longer ,Explain why its good to have the coating ?
Nano particles are tiny /large surface area therefore lasts longer or harder wearing .
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How would magnesium and sodium be different in metallic bonding ?
1.Magnesium is stronger/ higher mp and bp then sodium.2.There is a stronger/ bigger electrostatic force of attraction between the metal ions and the de localised in mg compared to na
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Predict the properties of methane and explain ?
Low mp / poor conductor because weak intermolecular forces therefore small amount of energy to overcome them.
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Methane is a gas at room temperature with reference to its structure and bonding explain why it has a low b.p ?
Methane is a simple covalent molecule which are very weak.Methane needs a small amount of energy to overcome these forces.
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Ionic bonding
An electrostatic force of attraction between oppositely charged ions
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Explain what polymers do ?
Polymers start off life as a small unsaturated (they contain at least one carbon-carbon double) molecules. They join together to make a larger,saturated molecule that consists of a larger number of these units repeated .
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Card 2

Front

How would magnesium and sodium be different in metallic bonding ?

Back

1.Magnesium is stronger/ higher mp and bp then sodium.2.There is a stronger/ bigger electrostatic force of attraction between the metal ions and the de localised in mg compared to na

Card 3

Front

Predict the properties of methane and explain ?

Back

Preview of the front of card 3

Card 4

Front

Methane is a gas at room temperature with reference to its structure and bonding explain why it has a low b.p ?

Back

Preview of the front of card 4

Card 5

Front

Ionic bonding

Back

Preview of the front of card 5
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