Sparklers contain small pieces of iron ... Some chemical formulas contain little numbers called ‘subscripts’. They represent the number of atoms of each element in the formula.

It is so hot in the blast furnace that carbon monoxide is the reducing agent which reduces the iron(III) oxide. The equation for the reduction of iron(III) oxide in the blast furnace is: ...

And, despite being made of iron ... the structure’s power is all down to ancient Indians’ skills. Researchers meticulously ...