alotropau carbon Flashcards

1
Q

beth yw alotrop?

A

ffurfiau ffisegol gwahanol o’r un sylwedd

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2
Q

beth yw buckminsterfullerene? (ffwleren)

A

moleciwlau sfferig o carbon (60 atom)

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3
Q

beth yw priodweddau buckminsterfullerene? (ffwleren)

A
  • hyblyg iawn
  • gryf
  • dargludo trydan
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4
Q

beth yw defnydd buckminsterfullerene? (ffwleren)

A
  • fel ireidiau (lleihau ffrithiant)
  • gyflymu adweithiau cemegol (catalyddion)
  • cyflwyno cyffuriau i’r corff
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5
Q

beth yw graffen?

A

haen sengl o carbon

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6
Q

beth yw priodweddau graffen?

A
  • cryf iawn
  • hyblyg iawn
  • ysgafn
  • dargludydd gwych
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7
Q

beth yw defnydd graffen?

A
  • ‘touchscreen’
  • mewn microchip
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8
Q

beth yw nanotiwbiau carbon?

A

tiwb o carbon wedi bondio’n gofalent

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9
Q

beth yw priodweddau nanotiwbiau carbon?

A
  • dargludo trydan
  • dargludo gwres
  • gryf iawn
  • ysgafn iawn
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10
Q

beth yw defnydd nanotiwbiau carbon?

A
  • ‘touchscreen’
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