In the catastrophic Big Rip scenario, what is the final structure to be torn apart by infinite expansion?

Answer

Fundamental particles

The Big Rip involves expansion accelerating infinitely in finite time, overcoming all cohesive forces sequentially, culminating in the destruction of even the smallest structures, including elementary particles.

In the catastrophic Big Rip scenario, what is the final structure to be torn apart by infinite expansion?
physicsuniversespeedcosmologyspacetimeexpansionBig RipUniverse Expansionrate of expansion