_____________________________________________ Small molecular elements and compounds have low melting points and boiling points, don’t conduct electricity and are gases at room temperature. Give some examples from the atmosphere and explain why they are like this. 6 marks Key words Molecule Element Compound Atom Forces Intermolecular Energy Weak force Strong force Covalent bond Charge Electrons QWC - Bubbles Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Hints List some elements and compounds found in the atmosphere Explain how the atoms are held together in these molecules Explain the forces of attraction between the molecules Explain why they don’t conduct electricity Detailed answer Many key words Clear order Good spelling, punctuation and grammar _____________________________________________ Simple answer Few key words No order Poor spelling, punctuation and grammar

C5: Assessment booklet – Hampton College Science Department 2012 For each of the elements, use the data provided to describe the state at room temperature (25oC). 6 marks Key words State Solid Liquid Gas Melting Boiling Temperature QWC - Bubbles Melting point (oC) Boiling point (oC) Oxygen -219 -183 Nitrogen -210 -196 Bromine -7 59 Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Hints Look at data for oxygen. Identify state at 25oC. Look at data for nitrogen. Identify state at 25oC. Look at data for bromine. Identify state at 25oC. Detailed answer Many key words Clear order Good spelling, punctuation and grammar _____________________________________________ Simple answer Few key words No order Poor spelling, punctuation and grammar

C5: Assessment booklet – Hampton College Science Department 2012 Covalent compounds are chemically bonded and have complete outer shell of electrons through sharing electrons with another atom. Draw dot cross diagrams for the following covalent compounds Hydrogen H2 Carbon dioxide CO2 Methane CH4 6 marks QWC - Bubbles Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Hints Use .or x to represent electrons Use the periodic table to check number of electrons in outer shell. Remember one shared pair of electrons = one bond. Detailed answer Many key words Clear order Good spelling, punctuation and grammar _____________________________________________ Simple answer Few key words No order Poor spelling, punctuation and grammar

_____________________________________________ Using your knowledge of ionic bonding and ionic compounds in the hydrosphere, explain why sodium chloride (NaCl) has a high boiling point. 6 marks Key words Ion Ionic Positive Negative Lost Gain Electron Metal Attract Lattice Energy Forces QWC - Bubbles Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Hints Which ions are present in NaCl? Why are the two ions attracted to each other? Consider number of bonds/attraction Consider energy needed to break the bonds Detailed answer Many key words Clear order Good spelling, punctuation and grammar _____________________________________________ Simple answer Few key words No order Poor spelling, punctuation and grammar

_____________________________________________ Key words Ion Ionic Positive Negative Lost Gain Electron Metal Non metal Precipitate Sodium Hydroxide Flame test Sulphate Carbonate Explain different ways in which you could identify an unknown Positive or Negative ions. 6 marks QWC - Bubbles Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Hints Explain what a positive ion is. Describe one way you can test for a positive ion. Describe a second way of testing for a positive ion. Give at least two examples of observations you would see. Detailed answer Many key words Clear order Good spelling, punctuation and grammar _____________________________________________ Simple answer Few key words No order Poor spelling, punctuation and grammar

_____________________________________________ Diamond and graphite are both giant covalent structures of carbon that are found naturally occurring as minerals in the earths crust which is part of the lithosphere. Compare the differences between their structure and properties which make them suitable for very different uses. 6 marks Key words Giant Covalent Weak forces Attraction Intermolecular Layers Forces QWC - Bubbles Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Hints Describe the structure of diamond and its properties and name a use. Describe the structure of graphite and its properties and name a use. Compare the structure of diamond and graphite Link structure to their uses. Detailed answer Many key words Clear order Good spelling, punctuation and grammar _____________________________________________ Simple answer Few key words No order Poor spelling, punctuation and grammar

_____________________________________________ Metal ores are rocks that contain varying amounts of minerals from which metals can be extracted. Often the metals is in a metal oxide such as Iron in haematite. Explain, including an equation, how Iron (Fe) can be separated from Iron (II) oxide (Fe203). 6 marks Key words Reduction Oxidation Ore Metal Carbon monoxide Electrolysis Extracted reactivity QWC - Bubbles Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Hints What chemical can be used to extract iron from iron oxide? Include a word equation… add a symbol equation too. Identify which reactants are oxidised and which are reduced. Detailed answer Many key words Clear order Good spelling, punctuation and grammar _____________________________________________ Simple answer Few key words No order Poor spelling, punctuation and grammar

_____________________________________________ Some reactive metals have to be extracted using electrolysis. Explain how electrolysis can be used to remove aluminium (Al) from its ore, bauxite (Al203). 6 marks Key words Electrolysis Electrodes Positive ions Negative ions Molten Oxides Conduct Attract QWC - Bubbles Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Hints Define the term electrolysis Explain what happens at the negative electrode. Explain what happens at the positive electrode. Include an equation showing the process. Detailed answer Many key words Clear order Good spelling, punctuation and grammar _____________________________________________ Simple answer Few key words No order Poor spelling, punctuation and grammar

_____________________________________________ How much copper (Cu) can be extracted from 800g of copper oxide (CuO), and how much from 800g of CuCO3? Remember to show your working. Explain which ore would be the most efficient to mine. 6 marks Key words Atomic mass RAM RFM Percentage Extracted Oxide Mass Yield Efficient Proportion QWC - Bubbles Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Hints Work out the relative formula mass of CuO and CuCO3? What is the relative atomic mass of Cu? Show your working for both calculations Compare them deciding which would be more efficient and why. Detailed answer Many key words Clear order Good spelling, punctuation and grammar _____________________________________________ Simple answer Few key words No order Poor spelling, punctuation and grammar

_____________________________________________ Which three of these elements are most likely to be metals. Explain how you that the other is definitely NOT a metal . 6 marks QWC - Bubbles element Melting point (oC) Density (g/cm3) Electrical conductivity A 1084 8.9 EXCELLENT B -39 13.6 VERY GOOD C 3500 3.51 VERY POOR D 1536 7.87 Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Hints Key words Melting Boiling State Conduct Free electrons metallic Identify which are metals. Link the properties to the arrangement of atoms Identify which isn’t a metal Which properties tell you it isn’t? Detailed answer Many key words Clear order Good spelling, punctuation and grammar _____________________________________________ Simple answer Few key words No order Poor spelling, punctuation and grammar