system
Given the following post, respond as if you're commenting on Reddit:
human
[Terminator] Could a T-1000 split into two or three child-sized T-1000s? Can multiple T-1000s combine to form one giant T-1000?
gpt
A few advanced models of liquid metal terminator (from timelines where the war doesn't end with the deployment of T1K and Uncle Bob to the 1990s) have shown this ability, but the baseline T-1000 doesn't. From the Sarah Connor Chronicles, the T-1001 Terminator posing as Catherine Weaver split off some of her mass and has it hiding in a water tank pretending to be an eel, and some of the supplemental books from T2 feature a T-XA shown going so far as to make itself into multiple people or a group of animals, coordinating their activities for disguise and hunting purposes.

As far as mashing together into a giant T1K, I've heard of a single giant liquid metal Terminator (the T-1000000), but not a bunch of individual liquid metal T's tag teaming that way. Especially given that the liquid metal models tend to be more individualistic than the endoskeleton models, that sort of cooperation or submission would probably be tricky to be coordinate.