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- 1. Multiple Choice
Structures of Silicon, diamond and graphite.
simple covalent moleculesmetallicionicgiant covalent - 2. Multiple ChoiceLow melting and boiling points which increase with increasing molecule size due to increased intermolecular forces.simple covalent moleculesmetallicionicgiant covalent
- 3. Multiple ChoiceMelting points are very high – a large amount of energy is needed to break all the covalent bondssimple covalent moleculesmetallicionicgiant covalent
- 4. Multiple Choice
Water has which structure
simple covalent
metallicionicgiant covalent - 5. Multiple Choice
What structure is shown in the diagram?DiamondGraphiteCarbon fiberCarbon nanotubes - 6. Multiple ChoiceWhy is diamond strong?It's made of carbonIt doesn't conduct electricity
It forms 4 strong covalent bonds arranged tetrahedrally
So it can cut glass - 7. Multiple ChoiceWhy is graphite so soft?A. The atoms are arranged in hexagons in layers that are held together strongly
B. Layers of atoms can slide over one another
C. Carbon is strongly bonded to 3 other carbon atoms.D. Carbon is weakly bonded to 3 other carbon atoms. - 8. Multiple ChoiceWhat element are diamond and graphite made up of?A. SodiumB. CarbonC. Carbon dioxideD. Silicon
- 9. Multiple Choice
Why does graphite conduct electricity?
Ions are free to move to carry the charge
Atoms can move
Delocalised electrons that can move
- 10. Multiple Choice
Diamond has a very high melting point due to each Carbon atom covalently bonded to 4 other Carbons in a giant structure which
are very strong and need lots of energy to break
are very weak and need lots of energy to break
are very weak and need llittle energy to break
sublime
- 11. Multiple ChoiceWhat structure is shown in the diagram?DiamondGraphitefullerene
- 12. Multiple Choice
Each carbon is graphite forms _____ bonds
1
2
3
4
- 13. Multiple ChoiceHow are covalent bonds explained?When one atom takes the other atom's electronWhen the atom shares an electron with an another atom
Electrostatic attraction between shared pair of electrons and the bonding nuclei
When the neutrons leave the nucleus - Answer choicesTagsAnswer choicesTags