Developing the Model of the Atom

Thomson

Thomson

________ suggested atoms were spheres of positive charge with tiny negative electrons stuck in them like fruit in a plum pudding- the plum pudding model.

Niels Bohr

________ said that electrons orbiting the nucleus do so at certain distances called energy levels.

Rutherford

________ replaced the plum pudding model with the nuclear model.

1804

In ________, John Dalton agreed with Democritus that matter was made up of tiny spheres that couldnt be broken up, but he reckoned that each element was made up of a different type of atom.

nuclear model

The ________ that resulted from the alpha particle scattering experiment was a positively charged nucleus surrounded by a cloud of negative electrons.

overall positive charge

It has an________

protons and neutrons

The nucleus contains_______

empty space

The rest of the atom is________

negative electrons

________move around the outside

number of neutrons

Number of protons=_________