Brody and tif

Events

Stone Age

8000 bc

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

Stone Age

6000 bc

Chemists investigated the properties of only those materials that were of high value to humans. (gold)

Bronze Age

4500 Bc

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

Iron Age

1200 bc

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

Iron Age

350 bc

Everything was made out of Air - Water - Earth - Fire (atomos particles)

Modern Time

1500

Theory of Matter was based more on experimentation. (History of Alchemy)

Modern Time

1660

Particles can be compressed. (Boyle)

Modern tme

1770

stem for the naming of chemicals was developed. (Lavoisier)

Modern time

1780

Air is necessary for combustion to occur.

Modern time

1808

Observation principles during experimentation.

Modern time

1897

Raisin bun model with charged particles

modern time

1904

Negatively charged particles orbiting around nucleus

Modern time

1922

Electrons rotate randomly around the nucleus.