Chemist: Erwin Schrodinger
Contribution: Developed the Quantum Mechanical Model
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Showing posts with label atomic models. Show all posts
Showing posts with label atomic models. Show all posts
1926, Quantum Mechanical Model
Year: 1926
Chemist: Erwin Schrodinger
Contribution: Developed the Quantum Mechanical Model
In 1926 Erwin Schrodinger took the Bohr model one step further and hammered out a system to predict the probability of an atom being in a specific position. This particular model can pictured as a nucleus surrounded by an electron cloud, with the densest portions of the cloud indicating higher probability of an electron being present there.
Information Credit: American Board for Certification of Teacher Excellence
Chemist: Erwin Schrodinger
Contribution: Developed the Quantum Mechanical Model
1913, The Bohr Model
Year: 1913
Chemist: Niels Bohr
Contribution: The Bohr Model
Niels Bohr developed his own atomic model by applying quantum theory, calculating possible energy levels for the atoms to orbit upon. His atomic model envisions the atom as a small, positively charged nucleus surrounded by electrons spinning in separate orbits, with the outermost electrons determining the element's properties.
Bohr's model relies on the ideas of both Ernest Rutherford and J.J. Thomson.
Information Credits: Royal Society of Chemistry, Live Science
Chemist: Niels Bohr
Contribution: The Bohr Model
Niels Bohr developed his own atomic model by applying quantum theory, calculating possible energy levels for the atoms to orbit upon. His atomic model envisions the atom as a small, positively charged nucleus surrounded by electrons spinning in separate orbits, with the outermost electrons determining the element's properties.
Bohr's model relies on the ideas of both Ernest Rutherford and J.J. Thomson.
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1911, Rutherford's Atomic Theory and Model
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Chemist: Ernest Rutherford
Contribution: Rutherford's Atomic Theory, Rutherford Atomic Model
In 1911, Ernest Rutherford published the results of his gold foil test, where he discovered that 1 in 8000 particles were deflected. From this he concluded atoms have a hard, positively-charged nucleus surrounded by however many negatively-charged
electrons, which occupy otherwise empty space.
From this, Rutherford developed his atomic model, which consists of a hard nucleus electrons continuously orbit.
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Information Credit: Royal Society of Chemistry
1904, Thomson's Plum Pudding
Year: 1904
Chemist: Joseph John Thomson
Contribution: Thomson's Plum Pudding Model
Seven years after his discovery of electrons, J.J. Thomson developed a new atomic model, called, "Thomson's Plum Pudding." It was Thomson's belief that atoms are positively charged, identical spheres. The electrons in this model were "baked" into the center of the atom, much like fruit cake or plum pudding.
It was replaced in 1911 for Ernest Rutherford's model.
Information Credit: Encyclopedia Britannica
Chemist: Joseph John Thomson
Contribution: Thomson's Plum Pudding Model
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It was replaced in 1911 for Ernest Rutherford's model.
Information Credit: Encyclopedia Britannica
400 B.C., The Democritus Atom
Year: Between 460 B.C. and 370 B.C.
Chemist: Democritus
Contribution: The Democritus Atom Model
The ancient Greek philosopher Democritus was of the first to develop an atomic theory, and in fact believed that everything is made of atoms which cannot be physically divided and are always in motion. He believed atoms exhibited the physical traits of the compounds they sustained, so an atom's shape might be hooked, sharp, pointed, slippery, or smooth depending on how it behaved in its extended existence.
That being said, Democritus's atoms could have looked any number of ways, but for the most part they were simply spheres, with special constructions added as needed.
Information Credits: Universe Today
Chemist: Democritus
Contribution: The Democritus Atom Model
The ancient Greek philosopher Democritus was of the first to develop an atomic theory, and in fact believed that everything is made of atoms which cannot be physically divided and are always in motion. He believed atoms exhibited the physical traits of the compounds they sustained, so an atom's shape might be hooked, sharp, pointed, slippery, or smooth depending on how it behaved in its extended existence.
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| Photo Credit: timerime.com |
Information Credits: Universe Today
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