-
Use Cases
-
Resources
-
Pricing
1649
% complete
The first scientific discovery of an element occurred in 1649 when Hennig Brand discovered the element Phosphorous.
1735
% complete
Swedish chemist Georg Brandt discovered the element Cobalt
1751
% complete
nickel was discovere∂ by Swedish Chemist Axel Fredrick Cronstedt.
1766
% complete
Henry Cavendish discovered Hydrogen as a colorless, odourless gas that burns and can form an explosive mixture with air
1774
% complete
Joseph Priestly discovers Oxygen
1808
% complete
English chemist, John Dalton who developed an atomic theory in 1803. Dalton 's atomic theory contains five basic assumptions: All matter consists of tiny particles called atoms.
1828
% complete
Johann Dobereiner developed groups of 3 elements with similar properties
1828
% complete
Jakob Berzelius developed a table of atomic weights & introduced letters to symbolize elements
1869
% complete
The modern edition of the periodic table was first published outside Russia by Dmitri Mendeleev.
1890 - 1900
% complete
Marie and Pierre Curie worked with uranium ore, extracting the uranium from it and experimenting with it and studying it. As a result, they discovered and were able to isolate radioactive materials.
1894
% complete
William Ramsay discovered the Noble Gases.
1895
% complete
Lord Rayleigh discovered Argon
1897
% complete
J. J. Thompson discovered the electron in 1897
1911
% complete
The atomic nucleus was discovered in 1911 by Ernest Rutherford made up of protons and neutrons
1926
% complete
Erwin Schrödinger developed an “Electron Cloud Model” in 1926. It consisted of a dense nucleus surrounded by a cloud of electrons at various levels in orbitals.
1926
% complete
Erwin Schrödinger developed an “Electron Cloud Model” in 1926. It consisted of a dense nucleus surrounded by a cloud of electrons at various levels in orbitals.