Either it died, is taking a bathroom break, or it just wants to.
I'm sorry to say this but sadly it may have died. I'm sorry :(
well different hamsters will react different my Russian did so if she acts weird don't be worried
If they have no physical contact they likely will not react in any way.
It will. It is the chemical compositions that react, not the physical state.
Chemical
When a person stares at them either ignore them; smile back or if you feel uneasy around them walk away and do not engage in conversation.
The ability to react with other substances is a chemical property.
chemical
It is a chemical property.
Yes, if they do not react with one another it is a physical change.
no failure to react is a chemical property
Sand and water do not react, they simply mix. This is a physical process.