|
|
PREHISTORIC TIMES
|
|
|
ANCIENT TIMES
(GREEKS, ROMANS,
EGYPTIANS) |
|
.................... |
1250
AD
-
1600
AD |
|
1557 Platinum (Pt)
(Julius Caesar
Scaliger
refers to
platinum in
his writings.
It had been
reported as
being used to
make jewellery
in the New
World). |
|
|
.................... |
1650
AD |
|
c1650 Robert
Boyle adopted
the scientific
method in his
chemical
research.
Chemistry
replaces
alchemy. |
|
|
.................... |
1700
AD
 |
|
|
|
1750
AD

|
|
1789 Antoine
Lavoisier's
Elementary
Treatise of
Chemistry
introduces a
new definition
of an element. |
|
|
1808
Boron (B)
Sir Humphry Davy (UK), Joseph Louis Gay-Lussac,
and Louis Jacques Thénard (France)
|
|
1800
AD
 |
|
1803
Cerium (Ce)
Martin
Klaproth (Germay)
and Jöns Jakob
Berzelius and
Wilhelm
Hisinger
(Sweden). |
|
1803 Osmium (Os)
Smithson
Tennant and
William Hyde
Wollaston (UK) |
|
1807 John
Dalton's
Theory of
Atoms is
published. |
|
|
1860
Caesium (Cs)
Robert
Wilhelm
Bunsen and
Gustav
Robert
Kirchhoff
(Germany) |
|
1898 Neon (Ne)
Sir William
Ramsay and
Morris William
Travers (UK) |
|
1898 Krypton (Kr)
Sir William
Ramsay and
Morris William
Travers (UK) |
|
1898 Xenon (Xe)
Sir William
Ramsay and
Morris William
Travers (UK) |
|
1850
AD

|
|
1861
Rubidium (Rb)
Robert
Wilhelm
Bunsen and
Gustav
Robert
Kirchhoff
(Germany) |
|