Answer:

Explanation:
Incorrect use has resulted in accidents and disfiguring burns. Never leave a methylated spirit appliance unattended. Also make sure that the camping stove or appliance is on a flat surface and that the fuel cannot spill out.
O2 is an element As it contains just one kind of atom, O2 is an element,
<span>The superscripts in an electron configuration represents the number of electrons and protons in an element. </span>
C I think it’s C I’m semi guessing