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20 questions
Which element in unlikely to occur as a native metal?
Gold
Silver
Copper
Aluminium
What extraction method is needed for the mineral ore hematite?
Electrolysis
Refining
Heating with carbon
Extraction with another metallic element
Is an alloy a mixture or pure substance?
Pure substance
Mixture
Bronze is a mixture of what two metallic elements?
Copper
Lead
Tin
Alluminium
Brass is a mixture of which two metallic elements?
Tin
Zinc
Copper
Iron
What is the best mineral ore for extracting aluminium?
Bauxite
Barite
Beryl
Bornite
For minerals, what does the Mohs Scale measure?
Conductivity
Density
Luster
Hardness
Why are aluminium and copper used in electrical wires?
More affordable than silver
Excellent conductivity
Low resistance
High densisty
What were the first two elements to exist?
Helium
Carbon
Iron
Hydrogen
How does the sun generate energy?
Nuclear fision
Nuclear fusion
Nuclear synthesis
Heat transfer
Which elements are unlikely to undergo nuclear fusion?
Iron
Nitrogen
Florine
Uranium
What is an alloy?
A combination of two or more metallic elements
A mixture of three metallic elements
A combination of a metallic element and non-metallic element
A metalloid
Which are examples of rock?
Basalt
Zinc
Fluride
Coal
Which is not a characteristic of a mineral?
Indefinite chemical composition
Crystal lattice structure
Inorganic solid
Naturally occurring
What statement is false about rocks?
Rocks are naturally occurring
Rocks are a mixture of several minerals
Rocks have no definite chemical composition
Rocks are a pure substance
In a redox reaction, what two reactions occur at the same time?
Oxidisation
Combustion
Reduction
Decomposition
Which is not a common type of mineral ore?
Hydrides
Oxides
Sulphides
Carbonates
The electrical conductors in electrolysis are called?
Conductors
Eletrons
Electrodes
Rods
In electrolysis, the anode has what type of charge?
Positive
Negative
In electrolysis, what type of ions are attract to the cathode?
Positively charged cations
Negatively charged anions
Positively charged anions
Negatively charged cations
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