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S2 Science Metals
flashcards
30
Science
Not Applicable
11/18/2013

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Cards

Term
What is an element?
Definition
a pure substance made up of only one type of atom
Term
What is the chart called that shows all the elements?
Definition
the periodic table
Term
What do the columns in the periodic table show?
Definition
the groups of elements
Term
What property of metals makes them useful in electrical cables?
Definition
conductor of electricity
Term
What property of metals makes them useful in pots and pans?
Definition
conductor of heat
Term
What property of metals makes them useful in jewelery?
Definition
shiny
Term
What property of metals makes them useful to make fence wires?
Definition
ductile
Term
What property of metals means they can be hammered into shape?
Definition
malleable
Term
What property of metals makes them useful in building bridges?
Definition
strong
Term
What property of metals makes them useful in musical instruments?
Definition
sonorous (makes a sound when hit)
Term
What is the name for the group 1 metals?
Definition
the alkali metals
Term
Which group contains the most reactive metals?
Definition
the alkali metals
Term
How must the alkali metals be stored?
Definition
they must be stored under oil
Term
What gas do the alkali metals produce when they react with water?
Definition
hydrogen
Term
What happens when you test Hydrogen gas with a burning splint?
Definition
hydrogen gas makes a ‘pop'
Term
Which metal is most reactive calcium magnesium or zinc?
Definition
calcium
Term
Which metal is least reactive calcium magnesium or zinc?
Definition
zinc
Term
How can gold be separated from the asnd and rocks it is found in?
Definition
panning
Term
Name two chemicals added to the iron oxide in a blast furnace
Definition
coke (carbon) and limestone
Term
What leaves the top of a blast furnace?
Definition
waste gases
Term
Why is limestone added to the blast furnace?
Definition
to remove the impurities from the molten iron
Term
What solid waste is made in the blast furnace?
Definition
slag
Term
What is rusting?
Definition
the corrosion of iron (&steel)
Term
What conditions are needed for rusting?
Definition
when iron is exposed to oxygen (in the air) and water, especially salty water
Term
What is ferroxyl indicator used for?
Definition
to show rusting
Term
What colour does ferroxyl indcator turn if rust is present?
Definition
blue
Term
Name thre physical barriers that can be used to prevent rusting.
Definition
painting, greasing / oiling, plastic coating
Term
What is galvanising?
Definition
coating iron in a thin layer of zinc
Term
What is added to iron to make stainless steel?
Definition
chromium
Term
What is sacrificial protection ?
Definition
attaching iron to a more reactive metal
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