Atomic History Review

Front

Oil Drop Experiment

Back

Conducted by Robert Millikan, this experiment measured the charge of the electron.

Front

Dalton's Atomic Theory: Atoms of the same element are identical in size, ______, and other properties.

Back

mass

Front

Cathode Tube Ray Experiment

Back

Conducted by J.J. Thomson, this experiment led to the discovery of the electron.

Front

Who discovered the nucleus?

Back

Ernest Rutherford, through his gold foil experiment, discovered the nucleus.

Front

Name the Model: Rutherford Nuclear Model (1911)

Back

This model proposed that an atom has a small, dense nucleus surrounded by electrons.

Front

Thomson Plum Pudding Model (1897)

Back

This model suggested that atoms are composed of electrons scattered within a 'soup' of positive charge.

Front

Bohr Planetary Model (1913)

Back

This model introduced the idea that electrons orbit the nucleus in fixed paths or energy levels.

Front

Quantum Mechanical Model (1926)

Back

This model describes electrons in terms of probabilities and wave functions rather than fixed orbits.

Front

Isotopes

Back

Atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

Electron

Back

A negatively charged subatomic particle found in all atoms.