Whose model suggested that negative particles were mixed in with positively charged material - like seeds in a watermelon?

Who discovered that the atom had an small, dense, positively charged center?

Place the following atomic models in order, from earliest to latest:

A) Rutherford B) Thomson C) Dalton

Who named the positive center of the atom the "nucleus?"

Which scientists believed an atom was indivisible? (Choose all correct responses.)

Which scientist discovered that the atom has parts - which means it can be divided?

Which scientist first suggested that atoms could join?

Which scientist believed that elements differed from one another because their atoms had different mass?

In the atomic model nicknamed the "plum pudding" model, what do the plums represent?