No, It moves as a mass, hence moving solid. If one of them is disturbed it sends a message to all the adjacent pixals to simultainiously explode. (unless in a different mode, then it would just erase itself)

P.S. In real life:

electric welder + silicon = plasma balls

https://www.youtube.com/watch?v=T7fUKEGyxS8

Then why do they vansish and not leave a blob behind? And plasma balls don't necessarally have to be just plasma only, they can be an ionized chemical reaction. That's what you see in the video, the silicon is rapidly oxidizing into silicon dioxide creating a plasma like reaction.