-
400
Start of the middle ages
The middle ages started with the collapse of the western roman empire and lasted form the 5th century to the 15th century -
400
Alchemists from the middle ages
The start of alchamey in the middle east -
Jan 1, 1500
End of the middle ages
The middle ages ended with the flouris of the renaissance culture throughout europe. -
Phosphorous discovered by H.Brand
The element phosphorus was discovered by H Brand, element symbol H with an atomic number of 15 -
Naming the Elements
This is the long tradition of naming each new element in Greek or Latin words -
Magnesium discovered by J.Black
-
Hydrogen was discovered by H.Cavendish
-
Oxygen was discoversed by C.W.Scheele
-
Nitrogen was discovered by D.Rutherford
-
Chlorine discovered by C.W.Scheele
-
Beryllium b was discovered by L.N.Vauquelin
-
Nuclei Atom
The discovery of radioactivity in the late 1800's -
Potassium discovered by H.Davy
-
Sodium discovered by H.Davy
-
Boron was discovered by J.L.Gay-Lussac & L.J.Thénard
-
Calcium disocvered by H.Davy
-
Lithium was discovered by J.A.Arfwedson
-
Silicon discovered by J.J.Berzelius
-
Aluminum discovered by H.C.Ørsted
-
Helium was discoverd by P.Janssen & J.N.Lockyer
-
Fluorine disovered by H.Moissan
-
Argon discovered by Lord Rayleigh & W.Ramsay
-
plum pudding
JJ.Thomas came up with the plum pudding model and the atomic structure theory -
Neon discovered by W.Ramsay & M.W.Travers
-
Rutherford
-
BHors
-
Enrico Fermi
Enrico Fermi was an Italian physicist, best known for his work on Chicago Pile-1, and for his contributions to the development of quantum theory, nuclear and particle physics, and statistical mechanics. -
New Elements
After the bombing of Japan there was discovery of a lot of elements -
COld War
-
USA and Russia Argue on naming the element
In the race to find new atoms the two countries started to argue about which name should be given, English or Russian.
