Reily's Timeline

Events

Stone Age

8000 BCE

Matter was made up of solid material, which could be fashioned into tools

Gold and Copper

6000 BCE

Chemists investigated the properties of only those materials that were of high value to humans

Bronze Age

4500 BCE

The effect of heat on copper, lead to the creation of a strong material (bronze) for use as tools

Iron Age

1200 BCE

Iron combined with carbon to make steel, for even stronger tools

Atomos Particles

350 BCE

Everything was made out of Air - Water - Earth - Fire

History of Alchemy

1500

Theory of Matter was based more on experimentation

Boyle

1660

Patricles can be compressed

Lavoisier

1770

System for the naming of chemicals was developed

Air is necessary

1780

Air is necessary for combustion to occur.

Modern Age

1800

The time that we live in now

Observation

1808

Observation principles during experimentation.

Particles

1897

Raisin bun model with charged particles

Orbiting around Nucleus

1904

Negatively charged particles orbiting around nucleus

Electrons

1922

Electrons rotate randomly around the nucleus.