Metals And Their Uses Flashcards
The earths crust contains many naturally occurring elements and compounds called what?
Minerals.
What is a mineral?
A naturally occurring chemical element or compounds that are not chemical combined.
What is a metal ore?
A naturally occurring mineral, from which it is economically viable to extract.
The earths crust contains many naturally occurring elements and compounds called what?
Minerals.
What is a mineral?
A naturally occurring chemical element or compounds that are not chemical combined.
What is a metal ore?
A naturally occurring mineral, from which it is economically viable to extract.
What is the earth crust made out of?
Compounds and elements called minerals.
A metal ore is a?
A mineral which contains enough metal to make it economically viable to extract it.
The method of metal extraction depends on what?
How reactive the metal is.
How can gold be extracted?
Through panning.
Most metals are found as what?
Metal oxides or compounds that are easily changed to metal oxides.
Metals that are less reactive than carbon can be extracted from…?
Their oxides by heating with carbon.
Metals more reactive than carbon are extracted using…?
Electrolysis of molton compounds .
Copper does not react with what?
Water.
How can copper be extracted by…?
From copper rich ores by heating the ores in a furnace (smelting).
Copper can be purified by doing what?
Electrolysis.
What happens during electrolysis in copper?
The positive copper ions move towards the negative electode and form pure copper metal.
What is phytomining?
An extraction method that uses plants to extract copper.
What is bioleaching?
An extraction method tgar uses bacteria to extract metals from low-grade ores.
What is a low grade ore?
Ores that contain small amounts of a subtance.
Molton Iron contains roughly …% iron?
96%
Molton Iron contains roughly …% Carbon and other metals?
4%
To produce pure iron all the …. have to be removed.
Impurities.
How are atoms in iron arranged?
In layers that can slide easily and be malleable.
