-
Period: to
Timeline on Atomic Theory
Timeline on Atomic Theory. -
Isaac Newton
Like Boyle (A well known scientist) Newton studied gases, and the possibility of atoms existing aound us. He proposed a mechanical like universe where small solid masses were in motion. In other words, he believed that there were little tiny pieces of mass that were 'swimming' everywhere, or through the atmosphere and everywhere around us in other words. The significance of his contribution was that He began to understand that atoms or particles move and are not stationary. -
John Dalton (Porposal of the atom)
1) All matter is made of atoms. Atoms are indivisible and indestructible. 2) All atoms of a given element are identical in both mass and properties 3) Compounds are formed by a combination of two or more different kinds of atoms. 4) A chemical reaction is classed as a rearrangement of atoms. He is best known for his contribution for pioneering work in the development of modern atomic theory and his research into colour blindness, sometimes referred to as Daltonism, in his own honour. -
Micheal Faraday
Studied the effect of electricity on solutions and atoms, he coined the term "electrolysis" as a splitting of various molecules with electricity and developed laws of electrolysis. His main discoveries to ongoing science study include electromagnetic induction, diamagnetism and electrolysis. -
Julius Plucker
Julius Plucker built one of the first gas discharge tubes known as the ("cathode ray tube"). Julius Plucker's cathode rays actually stimulated further research into atomic theory, as is put into evidence by the works of J. J. Thomson, who was able to put into fact, the mystery of Plucker’s cathode rays with his discovery of electrons in 1897 thanks to Julius Pluckers contribution. -
Dmitri Mendeleeff
He arranged elements into 7 groups with similar properties. He discovered that the properties of elements were also periodic functions of the their particular atomic weights. This became known as the Periodic Law. He had a major contribuition, developing the first periodic table, helping continue scientific research. -
George Johnstone Stoney
He had proposed that electricity was made of discrete negative particles which he called electrons. Stoney's most important scientific work which had a major contribution to atomics was the conception and calculation of the magnitude of the atom or particle of electricity, for which he coined the term "electron". He also estimated the number of molecules in a cubic millimetre of gas, at room temperature and pressure, from data obtained from the kinetic theory of gases.
