Hi. My name is J.J. Thomson. I was experimenting with currents of electricity in glass tubes, using cathode rays which are deflected by electric and magnetic fields. Using this information I thought that atoms were made up of negative charged particles. I had to make a model so people would understand my work which was that the negative charged particles were distributed like raisins inside a cake and the dough was the positive charge. So I named my model after plum pudding, which shows the positive charge and negative particles of an atom.
Oh. Hey. It's my former student Ernest Rutherford.
Hey professor. I have bad news for you. Using my gold foil experiment which is where I aimed alpha particles which are positively charged particles, at a gold foil, i was able to disprove your model. What happened was that most of the particles went straight through but some bounced back leading me to think that the atoms nucleus is positive with surrounding negative electrons.
Gosh Darn it. I new you were always my favorite student.
It's ok. I'm sure that we don't know everything about atoms yet.