Time line


Stone age

8000 B.C. - 4500 B.C

The first chemists learned how to start and control fire that led to cooking food and glass .
Between 6000 B.C. and 1000 B.C early chemists investigated in only materials that had value.
1200 B.C a group of people discovered how to extrat iron from rock.
4500 B.C. learned how to make a hard strong material gold,bronz ,and copper.

Iron age

2500 B.C. - 400 B.C.

people believed that matter is made up of small partical's.
greek's philosopher said everything is made from the earth fire,air,and water.
400 B.C. boyle became convinced that matter as suggested that matter was made up of small particials


384 BC - 100 B.C.

Because arlstotle was well now now and well repected his descripter of matter was perfered over democritus descriptered for 2000 years then there was magician part of scinctist

german alchemsits


The alchemists andrea's lidau published alchemia a book describing the achievements of alchemists.
from the late 1500s on people investigating the world around them became more like sincetists today

Robert Boyle

1627 - 1691

In the 1600s Robert Boyle experimented with the behavior of gasses.
Boyle became conivinced that matter was made up of particals.
In the 1770s the french sientists antoin lourent lavoiser studied chemical interactions.

john dalton

09/06/1766 - 07/27/1844

john was an english scinctist he used the observation from his exprinments to develop his own theory of the composition of matter

antoin laurent lavoiiser


Late 1780s he had developed system far naming chemicals.
The father of modern chemists unfortually he supported the losing side during the french revolation guillotine in 179.



thomson proposed what called the raisin bun model atom.

hantaro nagacka


the japanese physicist refined the model of the atom further.



he won a noble prize for his work in radicative which he carried out at mcgill universety in materials from 1998 to 1907



bohr won a noble prize in pysict in 1922