Atomic Theory

Did the gold foil experiment and concluded that the atom is mostly empty space with a nucleus in the center.

• Dalton

• Thomson

• Rutherford

• Bohr

Determined that electrons have energy levels.

• Dalton

• Thomson

• Rutherford

• Bohr

Found evidence of the neutron.

• Thomson

• Rutherford

• Bohr

• Chadwick

A philosopher that came before Aristotle and Socrates and was the first to think of atoms.

• Democritus

• Dalton

• Thomson

• Rutherford

Worked with gasses and stated that all matter is composed of indestructible particles called atoms.

• Dalton

• Thomson

• Bohr

• Chadwick

Developed the plum pudding model and did the cathode ray tube experiment.

• Dalton

• Thomson

• Rutherford

• Bohr

Smallest subatomic particle.

• electron

• proton

• neutron

• both protons and neutrons

Makes up the nucleus.

• electron

• proton

• neutron

• both protons and neutrons

A given element has a unique number

• electron

• proton

• neutron

• both protons and neutrons

Has no charge.

• electron

• proton

• neutron

• both protons and neutrons