The elements ${H_2}$ and $^{235}U$ are both used as fuels.
In these processes, the reactions are …..1….. and …..2….. oxidised.
Which words correctly complete gaps 1 and 2?
1 )
1: endothermic / 2: both elements are
2 )
1: endothermic / 2: only hydrogen is
3 )
1: exothermic / 2: both elements are
1: exothermic / 2: only hydrogen is
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