Presentation on theme: "Boardworks GCSE Science: Chemistry"— Presentation transcript:
1 Boardworks GCSE Science: Chemistry Properties of MetalsProperties of Metals
2 Boardworks GCSE Science: Chemistry Properties of Metals
3 Boardworks GCSE Science: Chemistry Uses of metalsBoardworks GCSE Science: ChemistryProperties of MetalsHow many different uses of metal can you spot?Teacher notesThis illustration contains several items made from metals and alloys, including:car: made from steel, aluminium and other metalsplane: made from titaniumgolf clubs: made from steel and titaniumband instruments: made from brass, an alloy of copper and zincZimmer frame: made from aluminium (the person using the Zimmer frame also has a titanium hip replacement)horse shoes: made from wrought ironfrying pan: made from stainless steeljewellery: made from gold and gold alloysdrinks can: made from aluminiummobile phone: made from various metalsspectacles: made from shape memory alloywheelchair: made from aluminiumbench: made from iron and steelrecycling bin: metal is a relatively easy material to recycle.
5 Boardworks GCSE Science: Chemistry Properties of metalsBoardworks GCSE Science: ChemistryProperties of MetalsTypical metals have a lot of physical properties in common. They:are lustrous (shiny)are malleable (can be bent and pressed into different shapes) and ductile (can be drawn into wires)are hard and stronghave a high densityare good conductors of heat and electricityhave high melting and boiling points (except mercury, which is liquid at room temperature).
6 Boardworks GCSE Science: Chemistry Au, Al, Cu, Fe and TiBoardworks GCSE Science: ChemistryProperties of MetalsTeacher notesSee the Alloys presentation for more information of the different uses of metal alloys, including steel.
7 Boardworks GCSE Science: Chemistry Testing propertiesBoardworks GCSE Science: ChemistryProperties of MetalsTeacher notesSee the Alloys presentation for more information about steel.This slide is accompanied by the worksheet Properties of Metals.
8 Boardworks GCSE Science: Chemistry Other uses of metalsBoardworks GCSE Science: ChemistryProperties of MetalsIt is easy to find products made from metals, but some uses of metals are not so widely known.Metals are used as catalysts to speed up reactions. Nickel is used as a catalyst to make margarine. Platinum is used in catalytic converters in car exhausts to clean up fumes and reduce pollution.Compounds containing metals have many uses. For example, some metal compounds are used to colour materials such as stained glass, and even make-up.Teacher notesResearch has recently been carried out on whether or not installing copper doorknobs in hospitals could stop the spread of the superbug MRSA, because of the antibacterial properties of the metal. For more information, visitThis weblink was working correctly at the time of publication. Boardworks takes no responsibility for the content of external websites.Can you find any other uses of metals?
9 Boardworks GCSE Science: Chemistry Building carsBoardworks GCSE Science: ChemistryProperties of MetalsTeacher notesInformation will be revealed by clicking on the following areas of the car:bonnetseattyresrear doorwindscreenheadlights.
10 Boardworks GCSE Science: Chemistry Aluminium or steel?Boardworks GCSE Science: ChemistryProperties of MetalsAluminium and steel (an alloy of iron) can both be used to make car bodies, but they have some different properties.aluminiumsteeldensity?magnetic?corrodes?malleable?lowhighnoyesnoyesyesyesTeacher notesSee the Extracting Metals by Electrolysis and Extracting Metals by Reduction presentations for more information on the costs involved in the production of aluminium (including the extraction process) and iron for steel. See the Alloys presentation for more information on the uses of steel.Steel is significantly cheaper to produce than aluminium, so a car made from steel will cost a lot less to produce, resulting in a lower purchase price for the consumer.
12 The importance of properties Boardworks GCSE Science: ChemistryProperties of MetalsTeacher notesThere are no right or wrong answers for this ordering activity, but students should be able to give reasons for their choices. Students could also be asked about factors other than the properties of a metal which determine how it should be used, for example, the cost of the metal, its abundance and its effect on the environment. See the Metals and the Environment presentation for more information on how metals affect the environment.
13 Boardworks GCSE Science: Chemistry Properties of Metals
14 Where are the transition metals? Boardworks GCSE Science: ChemistryProperties of MetalsThe transition metals are the block of elements found between group 2 and group 3 of the periodic table.group 2group 3transition metals
15 Common transition metals Boardworks GCSE Science: ChemistryProperties of MetalsTeacher notesSee the presentation Alloys for more information on Nitinol.
16 Boardworks GCSE Science: Chemistry Iron vs. aluminiumBoardworks GCSE Science: ChemistryProperties of MetalsTeacher notesStudents may need to be reminded that a paramagnetic metal is one that is able to become magnetized.
17 Boardworks GCSE Science: Chemistry Properties of Metals
19 Boardworks GCSE Science: Chemistry increasing reactivity Do all metals corrode?Boardworks GCSE Science: ChemistryProperties of MetalsMetals behave differently when exposed to the environment.potassiumincreasing reactivitysodiumA metal’s resistance to corrosion is related to its position in the reactivity series. The more reactive a metal, the less resistant it is to corrosion.calciummagnesiumaluminiumzincironGold is an unreactive metal and does not corrode easily. Items made from gold can survive for thousands of years and have even been found in good condition underwater.leadTeacher notesSee the presentations Electrolysis of Solutions and Extracting Metals by Electrolysis for more information on the reactivity series.Content on the reactivity series is higher tier for Edexcel GCSE Science.coppersilvergoldplatinum
20 Boardworks GCSE Science: Chemistry What is rusting?Boardworks GCSE Science: ChemistryProperties of MetalsRusting is the specific name given to the corrosion of iron.It is a chemical reaction between iron, oxygen and water.The chemical name for rust is hydrated iron (III) oxide.Rusting is an example of an oxidation reaction. Oxidation is the addition of oxygen to an element.hydrated iron (III) oxidewater+ironoxygenTeacher notesA wider definition of oxidation and reduction is that oxidation is the loss of electrons from a substance and reduction is the gain of electrons to a substance. See the presentations Electrolysis of Solutions and Extracting Metals by Electrolysis for more information on oxidation and reduction.Content on the word equation for rusting is higher tier for OCR Gateway GCSE Science.The opposite process, where oxygen is removed from a compound, is known as reduction.Acid rain and salt can increase the rate of rusting.
22 Why doesn’t aluminium corrode? Boardworks GCSE Science: ChemistryProperties of MetalsAluminium is a very reactive metal. However, it does not corrode in the presence of oxygen. Why is this?oxygen in the atmospherecoating of oxygen atomsaluminium atomsThe outer aluminium atoms react with oxygen in the atmosphere to form a thin layer of aluminium oxide on the metal’s surface, which protects the metal from corrosion.
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24 Boardworks GCSE Science: Chemistry GlossaryBoardworks GCSE Science: ChemistryProperties of MetalsTeacher notesalloy – A mixture containing one or more metal elements.catalyst – Any substance that starts or speeds up a chemical reaction without being affected itself.conductivity – The property that allows an electric current to pass through a substance.corrosion – The gradual destruction of a metal due to reactions with other chemicals in its environment.density – The mass of a substance per unit of volume.ductile – Able to be drawn into wires.fuel economy – The number of miles driven divided by the number of gallons of fuel consumed.Iron Age – The period of time between the Bronze Age and the Roman period (3,000–2,000 years ago) when iron was used to make tools and weapons.lustrous – bright and shiny.malleable – Able to be bent and pressed into different shapes.oxidation – The loss of electrons from a substance.reactivity series – A list of metals in order of reactivity, with the most reactive metal at the top of the list, and the least reactive at the bottom.reduction – The gain of electrons a substance.rusting – The specific name given to the corrosion of iron.transition metals – The block of elements found between group 2 and group 3 of the periodic table.
25 Boardworks GCSE Science: Chemistry Multiple-choice quizBoardworks GCSE Science: ChemistryProperties of MetalsTeacher notesThis multiple-choice quiz could be used as a plenary activity to assess students’ understanding of the properties of metals. The questions can be skipped through without answering by pressing the forward arrow. Students could be asked to complete the questions in their books and the activity could be concluded by the completion on the IWB.