Which part of earth contains plates

What does x represent in the formula for the compound xcl4?

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

The image shows a process that releases nuclear energy which statement best identifies the process shown the process must be fusion because energy is released the process must be fusion because of have your nucleus formed a smaller nuclei the process must be fission because a large nucleus breaks into smaller nuclei the process must be fission because neutrons are formed