Chemistry- structure and bonding

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Ionic bonding
Between a metal and a non metal. Giving away/ gaining electrons.
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Ionic substances
High melting point, metal and non-metal, can conduct electricity when dissolved in water or melted.
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Ions in ionic substances are held together by
electrostatic force of attraction (positive and negative) to create a giant lattice.
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Convalent bonding
Between two non-metals, sharing electrons.
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Convalent substances
Don't conduct electricity, low melting point, two non-metals.
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When you melt convalent substances, you break the weak..
...inter molecular forces.
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How many convalent bonds do diamond and graphite have?
4 and 3.
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Why can graphite conduct electricity?
Delocalised electrons between the layers.
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Fullerenes
Made of hexagons and pentagons. They are used as catalysts, lubricants, and drug delivery to the body.
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Do fullerenes have high or low melting/boiling points?
High.
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Nano science
Very small, used in cosmetics, sunscreen, medicane
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Risks of nanoscience
Explosions, end up in the air and blood streme.
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Other cards in this set

Card 2

Front

Ionic substances

Back

High melting point, metal and non-metal, can conduct electricity when dissolved in water or melted.

Card 3

Front

Ions in ionic substances are held together by

Back

Preview of the front of card 3

Card 4

Front

Convalent bonding

Back

Preview of the front of card 4

Card 5

Front

Convalent substances

Back

Preview of the front of card 5
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