-
400
The dark ages
Europe went through the dark ages -
Dsicovery of Magnesium
Magnesium was discovered by J.Black -
Discovery of Hydrogen
Hydrogen was discovered by H. Cavendish in 1766 -
Discovery of Oxygen
Oxygen was discovered by C.W.Scheele -
Discovery of Nitrogen
Nitrogen was discovered by D.Rutherford -
Discovery of Beryllium
Beryllium was discovered by L.N.Vauquelin -
Discovery of Sodium
Sodium was discovered by H.Davy -
Discovery of Boron
Boron was discovered by J.L.Gay-Lussac & L.J.Thénard -
Discovery of Lithium
Lithium was discovered by J.A.Arfwedson -
Dsicovery of Silicon
Silicon was invented by J.J.Berzelius -
Discovery of Aliminium
Aliminium was discovered by H.C.Ørsted -
Discovery of Helium
Helium was discovered by P.Janssen & J.N.Lockyer -
Discovery of Flourine
Flourine was discovered by H.Moissan -
The Plum Pudding
In 1897 J.J, Thompson came up with the atomic structure theory. In this theory all parts of the atom were positive recharge. -
Discovery of Neon
Neon was discovered by W.Ramsay & M.W.Travers -
Rutherfords Atom was experimented by Earnest Rutherford
In his famous experiment Earnest Rutherford shot alpha particles through a thin layer of gold foil, he found three things; Nearly all particles went through, this showed that nearly all of the atom was empty spaced. Some electrons were deflected (bent) out at wide angles, this showed that the centre of the atom had a nucleus. Some electrons were bounced right back meaning, this showed that nearly all the mass of the atom was at the nucleus. -
Bohr's atom by Neils Bohr
In 1913 Neils Bohr organized the electrons into shells which are now called orbitals. -
Enrico Fermi
Enrico Fermi suggested how it should be possible to make new elements, with atoms larger than the heaviest naturally occurring atoms of uranium -
World War 2
Element 93 was produced and other elements were also identified in the horrific after math of the nuclear bombs dropped on Japan at the end of the Second World War -
Elements 102 to 106
The Russians and Americans made the elements 102 to 106 but arguments started on what to name the elements, after many years of wrangling and debate the IUPAC finally named the elements.