What happens to the total mass of a substance undergoing a physical change?
only have eight

The total mass has to stay constant in any process, change, or
procedure, even if some of it gets away from you. 

Mass never just appears out of nothing, and it never just disappears. 
If it seems like the mass changed, then the extra mass had to come
from somewhere, or the missing mass had to go somewhere.
The total amount never changes.

The charge of an ion with 55 protons and 52 electrons is +3. the reason is because protons are positive, and there are three more than the amount of negative electrons.

As newton's first law states a object in motion stays in motion