PRESENTATION OUTLINE
Once
there was a guy named Democritus who was the first person to view the particles that make up matter
the model looked like a normal sphere.
in 1808 a man named John Dalton did various experiments & found out that all matter is made up of atoms
He used a pool ball as his model
In 1897 j.j Thomson did the cathode ray tube experiment an discovered the election
The model he made was called the plum pudding model which was similar to a chocolate chip cookie
in 1910 a guy named Ernest Rutherford did an experiment with gold foil and found that there is a nucleus in the atom.
at last, Niels bohr in 1915 did more experiments and said that neutrons move around the nucleus
his model looked like planets orbiting around the sun.
Even to this day people are still observing the atom and discovering more things about them.
