Deduce the percentage by mass of the other elements in the Moon’s crust.
State which element occurs in the Earth’s crust at the highest percentage by mass.
Give two main differences in the composition of the Earth’s crust and the Moon’s crust.
Complete the diagram to show the electron arrangement in a silicon atom.
Complete the chemical equation for this reaction. … Fe + … O$_2$ → Fe$_3$O$_4$
The raw materials added to the blast furnace are iron ore, limestone and [BLANK]. Carbon monoxide reacts with iron(III) oxide to make iron. In this reaction iron(III) oxide is [BLANK]. Limestone decomposes to form calcium oxide and carbon [BLANK]. Calcium oxide reacts with impurities in the iron ore to make [BLANK].
Explain how the oxygen removes the carbon.
Choose from the list the name of the other type of compound used to convert iron into steel: acidic oxide, alcohol, basic oxide, hydrocarbon.
Choose the diagram, J, K, L or M, that best shows an alloy.