Pluto - Vol. 8 Ch. 56

[MangaDex]

 

[Goyal99Raj]

Antiproton --> antimatter version of proton --> proton with negative charge --> turns into energy when encountering protons --> every atom is around 50% protons by mass --> bomb spreading antiprotons would destroy every atom it comes into contact with

 

[Cazin]

Atom's hair getting closer to his classic hairstyle makes me think those are the "horns" he was given after being killed by Pluto. It's an interesting creative touch.

Or I'm just seeing things.