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Dalton's Model of the Atom / J.J. Thompson / Millikan's Oil Drop Experiment / Rutherford / Niels Bohr / DeBroglie / Heisenberg / Planck / Schrödinger / Chadwick
Austrian physicist Erwin Schrödinger lays the foundations
of quantum wave mechanics. In a series papers he
describes his partial differential equation that is the
basic equation of quantum mechanics and bears the same
relation to the mechanics of the atom as Newton's
equations of motion bear to planetary astronomy.
The equation- The mathematical
description of the electrons is given by a wave
function,
Schrödinger’s equation requires
calculus and is very difficult to solve, but the
solution of the equation, when treated properly, gives
not the exact position of the electron (remember
Heisenberg), but the
This is very much like the possible
positions of the electron in an orbital.
Most of the time, the negative electron will be
close to the positive nucleus, but sometimes, it will
not. We
cannot tell anything about when the electron (firefly)
occupied a certain point, but looking at the whole
volume of probability (orbital) we can see where it is
likely to be found.
If we draw a circle around 90% of the flashes, we
have defined one type of orbital, in this case, a
sphere. This
shape would be one solution to the Schrodinger equation
for where to find the electron in a hydrogen atom.
Recall in Bohr’s model that each electron orbit
had a certain energy associated with it and only certain
orbits were allowed, thus the
Bonus Schrödinger's cat Schrödinger's Cat: When the nucleus decays, the Geiger counter may sense it and trigger the release of the gas. In one hour, there is a 50% chance that the nucleus will decay, the gas will be released and the cat killed. from wiki-http://en.wikipedia.org/wiki/Schr%C3%B6dinger's_cat
Dalton's Model of the Atom / J.J. Thompson / Milliken's Oil Drop Experiment / Rutherford / Niels Bohr / DeBroglie / Heisenberg / Planck / Schrödinger / Chadwick |