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Antone Lavoisier
Lavoisier helped construct the metric system, then wrote the first extensive list of elements, and helped to reform chemical nomenclature. -
joseph louis proust
Joseph Louis Proust discovery of the law of constant composition stating that chemical compounds always combine in constant proportions. -
John Dalton
Dalton began a series of experiments which would end up in him proposing the theory of atomic compositions – which thereafter would be known as Dalton’s Atomic Theory and would then become one of the cornerstones of modern physics and chemistry -
Indivisible, solid sphere model
The Solid Sphere Model was the first atomic model and was developed by John Dalton. He hypothesized that an atom is a solid sphere that could not be divided into smaller particles. He came up with his theory as a result of his research into gases. He realized that certain gases only combined in specific proportions. -
michael faraday
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. -
max planck
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henri becquerel
When becquerel was studying the effect of x-rays on photographic film, he discovered some chemicals spontaneously decompose and give off very pentrating rays. -
J.J Thomsom
J.J. Thomson's discovery of the electron in 1897 showed us that the atom can be split into even smaller parts. His discovery was the first step towards a detailed model of the atom. -
Marie Curie
Marie Curie discovery is important because she formed a crucial hypothesis that the emission of rays by uranium compounds could be an atomic property of the element uranium--something built into the very structure of its atoms. -
Plum Pudding Model
The plum pudding model is an obsolete scientific model of the atom proposed by J. J. Thomson. It was devised shortly after the discovery of the electron but before the discovery of the atomic nucleus -
Albert Einstein
The missing matter has been converted to energy and you can calculate how much using Einstein's equation E=mc2. -
Planetary Model
The Rutherford model is a model of the atom devised by Ernest Rutherford. Which is a relatively high central charge concentrated into a very small volume in comparison to the rest of the atom and with this central volume also containing the bulk of the atomic mass of the atom. -
ernest rutherford
Rutherford discovery helped determine the nucleus of the atom -
Robert Milikan
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niels bohr
Bohr developed and published his model of atomic structure, known as the Bohr model, which shows the atom as a small, positively-charged nucleus surrounded by negatively-charged electrons that travel in circular orbits around the nucleus, similar in structure to the Solar System, but with electromagnetic forces providing attraction, rather than gravity -
Louis de Broglie
Louis de Broglie discovered the wave nature of electrons and suggested that all matter have wave properties. -
Electron Cloud Model
The electron cloud model is different from the older Bohr atomic model by Niels Bohr. Bohr talked about electrons orbiting the nucleus, in a way similar to how the planets go around the Sun. The electron cloud model says that we can not know exactly where an electron is at any given time, but the electrons are more likely to be in specific areas. -
Ernest Schrodinger
The reason why Schrodinger discovery was so important because the three coordinates that come from Schrodinger's wave equations are the principal (n), angular (l), and magnetic (m) quantum numbers. These quantum numbers describe the size, shape, and orientation in space of the orbitals on an atom. -
Quantum Mechanical Model
In this model energy Is Quantized. After Max Planck determined that energy is released and absorbed by atoms in certain fixed amounts known as quanta, Albert Einstein took his work a step further, determining that radiant energy. -
James Chadwich
James Chadwich used alpha particles discovered a neutral atomic particle with a mass close to a proton. This le to the discovery t of the neutron. -
Otto Hahn
Otto Hahn became the first to recognize that the uranium atom, when bombarded by neutrons, actually split. -
lise meitner
Meitner collaborated with him in the discovery and gave the first theoretical explanation of the fission process. -
glenn t seaborg
Glenn T. Seaborg synthesized 6 transuranium elements and suggested a change in the layout of the periodic table.
