Front

Atoms

Back

It is the smallest unit of an element that retains the chemical properties of that element.

Front

Nucleus

Back

It is the dense, positively charged central core of an atom.

Front

Proton

Back

It is a subatomic particle with a positive charge found in the nucleus.

Front

Planetary Model

Back

It is an early model of the atom that pictured electrons orbiting the nucleus like planets around the sun.

Front

Nuclear Model

Back

It is a model of the atom with a small, dense, positively charged nucleus surrounded by mostly empty space.

Front

J.J. Thomson

Back

He/She is the scientist who discovered the electron using the cathode ray tube.

Front

Electron

Back

It is a subatomic particle with a negative charge found in the electron cloud.

Front

Ernest Rutherford

Back

He/She is the scientist who conducted the gold foil experiment, leading to the discovery of the nucleus.

Front

Gold Foil Experiment

Back

It is the experiment that demonstrated the existence of a small, dense, positively charged nucleus.

Front

James Chadwick

Back

He/She is the scientist who discovered the neutron.