Answer:
if an atom gains an electron, the ion has negetive charge
Space -filling models are also known as Calotte models. These are 3 dimensional models that depict the spatial relationships between atoms.
The space-filling model of water molecule shows the 3 D structure of the water molecule. This model CLEARLY REVEALS THE OXYGEN ATOM WHICH IS LOCATED CENTRALLY WITH TWO HYDROGEN ATOMS IN THE ADJACENT SIDES. THE MODEL ALSO SUGGESTS HOW THE WATER MOLECULES ATTRACT EACH OTHER.
An electron is a negatively charged subatomic particle, whereas a proton is positively charged, and a neutron has no charge.
So that they will mix in better, or more easily. However you want to say it.
The answer to this question I think would be 2: Better
