Which scientist first made a model of the atom called the plum pudding model? john dalton j. j. thomson ernest rutherford neils bohr

The scientist that developed this model is J.J Thomson.

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.