Flashcards
Metals and Their Uses FLASHCARDS
Flashcards do conjunto (28)
- 1Why is Pure Iron too softAtoms are arranged so that the layers slide
- 2How is steel madeBy removing carbon from molten iron
- 3Property of Stainless SteelResistant to corrosion
- 4Property of High Carbon SteelHard
- 5Property of Low Carbon SteelEasily Bent
- 6What is an Alloy?A MIXTURE OF TWO OR
MORE ELEMENTS, WHERE
AT LEAST ONE IS A
METAL - 7Pure copper, iron, gold and aluminium are too ___ for many uses.Soft
- 8Is an alloy harder or softer than pure metal?Harder
- 9What properties do TRANSITION METALS have in common?- Malleable (Can be hammered or bent into any shape)
- They are metals
- They are good conductors of heat and electricity - 10What is an ore?A rock containing a metal
- 11Why is gold found as itself?Because it is too unreactive to extract
- 12How are metals produced?When metal oxides have their oxygen removed.
- 13Metals ABOVE carbon in the reactivity series have to be extracted by what method?Electrolysis
- 14Metals BELOW carbon on the reactivity series are extracted by how?By adding carbon
- 15Reaction in which oxygen is removed is called?Reduction Reactions
- 16What term is the same as 'High Concentration of Copper Compounds'?Copper-Rich
- 17How to extract from Copper-Rich ores?Smelting (Heating in a furnace)
- 18What research are scientists doing to do with copper?Trying to find 'low grade ores' to extract copper without damaging the environment
- 19What is PHYTOMININGWhen plants absorb copper compounds through their roots, then are burnt to produce ash that contains copper compounds
- 20What is BIOLEACHINGWhere some bacteria absorb copper compounds, then produce solutions called leachates which contain copper compounds
- 21Properties of Copper?- Soft
-Easily bent
- Good conductor of electricity
- Good for wiring - 22What is copper good for?- Plumbing, pipes and tanks because it does not react with water and is a good conductor of heat
- Wiring because it is a good conductor of electricity - 23Why should we recycle Aluminium?Less energy is needed to produce recycled aluminium than to extract it from its ore. Less damage to the environment
- 24What is aluminium used for?-Aircraft
-Trains
-Overhead power cables
-Saucepans
-Cooking Foil - 25What is titanium good for?-Fighter aircraft
-Artificial hip joints
-Pipes in nuclear power stations - 26Is Aluminium Low Density, or High DensityLow Density (It is lightweight for its size)
- 27Why does Aluminium and Titanium resist corrosion?They have a very thing layer of their OXIDE on the surface, which stops air and water getting to the metal.
- 28Why is Aluminium and Titanium expensive to extract?-It cannot be extracted by reduction with carbon
-The processes have many stages
-Large amounts of energy needed
Informações
- Descrição
- These flashcards are based off the knowledge in my Metals and their Uses mindmap
- Criado por
- Tim Parker
- Visualizações
- 45
- Avaliação