Compared to the charge of proton the charge of an electron has

The opposite chare. a proton has a positive charge while an electron has a negetive charge. the reason being that a poisitive and a negetive put together makes a neutral charge. so yeah. it has a negetive charge. hope this helps!

Yes, endothermic means it turns cold. and some chemical changes include change of tempature.

That depends. cause the owl finished it in one lick