Basic Chemistry Concepts

Front

Democritus

Back

Front

John Dalton

Back

English chemist and physicist who developed the atomic theory of matter, proposing that each element is made of unique atoms.

Front

JJ Thomson

Back

Discovered the electron and proposed the plum pudding model of the atom.

Front

Ernest Rutherford

Back

Conducted the gold foil experiment and proposed the nuclear model of the atom, identifying the nucleus.

Front

Eugene Goldstein

Back

Discovered canal rays, which led to the identification of the proton.

Front

James Chadwick

Back

Discovered the neutron, a neutral particle within the atomic nucleus.

Front

Proton

Back

A positively charged subatomic particle found in the nucleus of an atom.

Front

Neutron

Back

A subatomic particle with no charge, found in the nucleus of an atom.

Front

Electron

Back

A negatively charged subatomic particle orbiting the nucleus of an atom.

Front

Mass Number

Back

The total number of protons and neutrons in an atom's nucleus.