Autores
Created bySamar Hussain
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Eventos
John Dalton:
Proposed an "atomic theory" with spherical solid atoms based uponIsaac Newton:
Proposed a mechanical universe with small solid masses in motion.Michael Faraday:
Studied the effect of electricity on solutions, coined term "electrolysis" as a splitting of molecules with electricity, developed laws of electrolysis. Faraday himself was not a proponent of atomism.Lothar Meyer:
Classified elements into six families by their valence.Dmitri Mendeleev:
Arranged elements into 7 groups with similar properties. He discovered that the properties of elements "were periodic functions of the their atomic weights". This became known as the Periodic Law.James Clerk Maxwell:
Proposed electric and magnetic fields filled the void.G.J. Stoney:
Proposed that electricity was made of discrete negative particles he called
" electrons ".Henri Becquerel:
While studying the effect of x-rays on photographic film, he discovered some chemicals spontaneously decompose and give off very pentrating rays.Max Planck:
Used the idea of quanta (discrete units of energy) to explain hot glowing matter.Nagaoka:
Postulated a "Saturnian" model of the atom with flat rings of electrons revolving around a positively charged particle.Abegg:
Discovered that inert gases had a stable electron configuration which lead to their chemical inactivity.Albert Einstein:
Published the famous equation E=mc 2Aston:
Discovered the existence of isotopes through the use of a mass spectrograph.Enrico Fermi:
Conducted the first controlled chain reaction releasing energy from the atoms nucleus.
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