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- 1What charge do electrons have?-1
- 2What charge will an ion of lithium take?1+ (one electron in the outer shell, needs to lose it)
- 3What charge will an ion of beryllium take?2+ (two electrons in the outer shell, needs to lose them both)
- 4What charge will an ion of barium take?2+ (group 2 so two electrons in the outer shell, needs to lose them both)
- 5What charge will an ion of fluorine take?1- (7 electrons in the outer shell, needs to gain one)
- 6If something has gained electrons, what charge will it have?Negative
- 7If something has lost electrons, what charge will it have?Positive (because they have lost a negative!)
- 8What charge will an ion of oxygen take?2- (6 electrons in outer shell so needs to gain two)
- 9What charge will an ion of Selenium take?2- (group 6, so has 6 electrons in the outer shell and needs to gain two)
- 10Explain in terms of electrons what occurs when lithium bonds with chlorineOne electron transferred from lithium to chlorine
- 11Why do atoms transfer electrons in ionic bonding?So that they can have full outer shells
- 12Explain in terms of electrons what occurs when lithium bonds with fluorineOne electron transferred from lithium to fluorine
- 13Explain in terms of electrons what occurs when magnesium bonds with oxygenTwo electrons transferred from magnesium to oxygen
- 14Explain in terms of electrons what occurs when beryllium bonds with oxygen (3 marks)Two electrons transferred from beryllium to oxygen
- 15Explain in terms of electrons what occurs when magnesium bonds with chlorineOne electron transferred from magnesium to two different chlorine atoms
- 16Explain in terms of electrons what occurs when sodium bonds with oxygenTwo electrons transferred to an oxygen atom from two different sodium atoms
- 17Why do sodium ions and chlorine ions form an ionic bond?There is an electrostatic force of attraction between oppositely charged ions
- 18Why don't sulphur ions and oxygen ions form ionic bonds with each other?Both have negative charges so would repel
- 19What is the name for a substance made of billions of oppositely charged ions joined together?Giant ionic lattice
- 20Define giant ionic latticeA huge 3D network of ions
- 21State the melting points of ionic substancesHigh
- 22Explain why ionic substances have high melting points.Strong bonds between oppositely charged ions are hard to break
- 23Will NaCl(s) conduct electricity?No
- 24Will NaCl (aq) conduct electricity?Yes (aq stands for aqueous which means it is dissolved in water)
- 25Will NaCl (l) conduct electricity?Yes
- 26What does molten mean?Melted
- 27Explain why ionic compounds do not conduct electricity when solidBecause the ions are not free to move
- 28Explain why ionic compounds conduct electricity in solutionBecause the ions are free to move
- 29Explain why ionic compounds conduct electricity when moltenBecause the ions are free to move
- 30What does soluble mean?Dissolves in water
- 31What does insoluble mean?Does not dissolve in water
- 32Magnesium carbonate is insoluble. What do you need to do before it will conduct electricity?Melt it
- 33Explain why chlorine and fluorine form covalent bondsThey are both non-metals
- 34Complete the sentence: In covalent bonds, electrons are _______________________Shared
- 35In ionic bonds, electrons are ___________________Transferred
- 36What is the name given to the structure of diamond, graphite and silicon dioxide?Giant covalent
- 37How many bonds does each carbon have in diamond?4
- 38Explain why diamond has a high melting pointGiant structure, Strong covalent bonds between the atoms, requires a lot of energy to break
- 39Explain why most giant covalent substances do not conduct electricity (3 marks)There are no electrons/ions/charged particles that are free to move
- 40Explain why graphite conducts electricityHas delocalised electrons between the layers that can move through the graphite
- 41Explain why graphite can act as a lubricantWeak forces between layers which are free to slide over each other
- 42What is graphene?One layer of graphite
- 43What is a fullerene?Substance made of carbon atoms arranged in a cage
- 44What type of substance are methane and water?Simple molecular (or simple molecules)
- 45What is a molecule?A group of atoms chemically bonded together
- 46Describe the structure of simple covalent moleculesStrong covalent bonds between atoms, weak forces holding the molecules together
- 47What are intermolecular forces?Weak forces between molecules which hold them together
- 48Explain why methane has a low melting pointIt is a simple molecular substance with weak forces between the molecules (which are easy to break)
- 49What is a polymer?Millions of small molecules joined together in a chain to form a large molecule
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- Fichas sobre Sin título, creado por Greg Ciolek el 04/02/2019.
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- Greg Ciolek
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