Phosphorus as many different allotropes (ie same element but different molecular arrangements). Matches use red phosphorus which is much more stable than white phosphorus which bursts into flames if not submerged in water at all time. It also has a role in biology, such as the backbone of DNA.

Intensely pyrotechnic and a poison that attacks the bones.

Its use in war has tried to be outlawed.

See Willy Pete bomb.

Queerbrony69 said:
Phosphorus as many different allotropes (ie same element but different molecular arrangements). Matches use red phosphorus which is much more stable than white phosphorus which bursts into flames if not submerged in water at all time. It also has a role in biology, such as the backbone of DNA.

I think you missed ATP and ADP there.

RandomIntigers779 said:
I think you missed ATP and ADP there.

Krebs cycle:

https://en.wikipedia.org/wiki/Citric_acid_cycle#Efficiency