Metals quizzes Flashcards
What are metal ores
valuable metals that react with other elements,
found in the earths crust
the more reactive the metal, the… it is to …
harder, extract
lots of common metals react with … to form the … that are often the ores the metals need to be extracted from
oxygen, oxides
The order of the reactivity series, GO
P S C M A C Z I T L
Peeing sat cross makes a cramp zit in the lip
How are the ‘ less reactive than carbon’ extracted
reduction reaction with carbon
heat the ore with carbon
How are the ‘ more reactive than carbon’ extracted
electrolysis
melt the ore and use as electrolyte
general Properties of metals, GO
Strong
Malleable
conductors
Which metals in the reactivity series are more likely to corrode
Higher up, most reactive
What property would make a metal ‘soft’
A regular arrangement, layers, of identical atoms which can slide over each other
Define an alloy
A mixture of metals
Give an example of an alloy
Steel, usually carbon+iron
Benifits of alloys over pure metals
Form an irregular arrangement, harder for layers to slide over each other
Whats meant by an alloy with ‘shape memory’
object goes back to original shape when heated
Reasons for recycling metals
Finite amount, resource conservation
Cheaper
Less pollution
