Identify which feature of graphene is responsible for its high electrical conductivity?2D structureStrong covalent bondsNon-polar bondsDelocalised electronsReport feedback or error

How many covalent bonds does each carbon atom in diamond form?23452How many covalent bonds does each carbon atom in graphite form?53423Why can graphite conduct electricity?Because it is a metalBecause it has delocalised electrons that can move along between its layersBecause it has a very high melting pointBecause all the electrons are fixed in place within the covalent bonds4Why can diamond not conduct electricity?Because all the electrons are delocalisedBecause all the electrons are fixed in place within the covalent bondsBecause it has a very high melting pointBecause it is not a metal5Why do diamond and graphite have such high melting points?Because they are so bigBecause they have very strong intermolecular bondsBecause they have delocalised electronsBecause they have very strong covalent bonds6Which statement best explains why graphite is soft?The covalent bonds are easy to breakIt can conduct electricityIt has a rigid structureThe layers of carbon atoms can slide over each other

Explain why graphite is:• a good electrical conductor• soft and slippery.You should answer in terms of structure and bonding.[6 marks]

For decades, the existence of graphene, a material only one atom thick, was considered purely theoretical, but in 2004, physics researchers Andre Geim and Konstantin Novoselov created it in a lab by arranging carbon in a hexagonal lattice structure. Their subsequent studies documenting the material, for which they jointly won the Nobel Prize in Physics in 2010, ------- graphene’s extraordinary strength, electric conductivity, transparency, and density.Which choice completes the text so that it conforms to the conventions of Standard English?to demonstrateeliminateand demonstratedeliminatedemonstratedeliminatedemonstrating

explain the properties of graphite interms of its structure and bonding

Which of the following statements are usually correct for carbon compounds ? These(a) are good conductors of electricity(b) are poor conductors of electricity(c) have strong forces of attraction between their molecules(d) do not have strong forces of attraction between their moleculesA (a) and (c) B (b) and (c) C (a) and (d) D (b) and (d)