Question

what creates the \space\ indicated in this \space filling\ model of water? constantly moving protons stationary elections constantly moving neutrons constantly moving electrons

Explanation:

In an atom, electrons are in constant motion around the nucleus. In a space - filling model of water, the space is due to the volume occupied by the constantly moving electrons of the hydrogen and oxygen atoms that make up the water molecule. Protons and neutrons are in the nucleus and do not contribute to this space in the way electrons do. "Stationary elections" is a non - relevant term here as it has nothing to do with atomic structure or the space in a water molecule model.

Answer:

constantly moving electrons