Atomic theories throughout history... by Isabella López https://padlet.com/isabellalopezne/xv588d93kh06wi27 From Democritus to Einstein to Schrodinger en-us 2020-12-11 13:25:17 UTC 2020-12-11 21:47:26 UTC hello@padlet.com Democritus isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009603728 2020-12-11 13:27:20 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009603728 What did he propose? isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009636810 -Democritus was one of the first thinkers that had the curiosity to find out what matter was made of.

-He stated that everything was made up of tiny indivisible particles and empty space.

-He based his findings in philosophy, reasoning and math.
]]> 2020-12-11 13:39:07 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009636810 Model... isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009653098 A solid, uniform sphere.]]> 2020-12-11 13:44:10 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009653098 John Dalton isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009656463 2020-12-11 13:45:11 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009656463 What did he propose? isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009663955 -Dalton states that all matter is composed of atoms, which are unbreakable.

-He rejected Democritus' theory, that every atom was alike, and sugested that every element has a specific structurized atom which share the same chemical properties.

-He stated that atoms of different elements have different weights and these join to create molecules.

]]> 2020-12-11 13:47:26 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009663955 Model... isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009675391 Solid, nanoscopic sphere.
Smallest particle of mass.]]> 2020-12-11 13:50:47 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009675391 Evidence to prove this isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009676518 -Through the gasses and pressures experiment, which later on was proved erroneous.

-Different gasses were used in an experiment to observe how they were different in between them and how they acted independantly.

]]> 2020-12-11 13:51:06 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009676518 J.J Thomson isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009679574 2020-12-11 13:51:59 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009679574 His theory... isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009683590 Discovered the electron.

-His idea was very similar to the photon discovery, which was done years later by Einstein.

]]> 2020-12-11 13:53:08 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009683590 Model... isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009684933 Thomson proposed that these discovered electrons were embeded in a positively charged sphere.
-Model known as the plum pudding model.]]> 2020-12-11 13:53:28 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009684933 Experiment isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009685206 -In the Cathode ray experiment somehting was producing a bright light, and Thomson knew that it wasn't because of the recently discovered x-rays.

-He argumented that these rays of light were produced by charged particles, since they were manipulated by altering the electrical field.

]]> 2020-12-11 13:53:33 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009685206 Max Planck isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009687264 2020-12-11 13:54:07 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009687264 Proposed isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009688209 -Explains black body radiation and proposed the quantum theory, which would be the fundamental science of the quantum model of the atom and quantum mechanics.

-Formulated Plancks constant, included in mathematical equations years later.

]]> 2020-12-11 13:54:22 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009688209 Quantum theory isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009691588
-He stated that radiation is due to the movement of charged particles, each particular radiation occurs in specific packs of energy called Quanta, which are emited as waves.
]]> 2020-12-11 13:55:21 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009691588 Hantaro Nagaoka isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009693084 2020-12-11 13:55:44 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009693084 His theory... isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009693951 -Nagaoka refused Thomson´s idea and developed the saturnian model, proposing that a ring of electrons surrounded a huge atomic centre.

-Also, he stated that electrons were held by gravitational forces.

-No experiment for this reasoning has been know until today.
]]> 2020-12-11 13:55:59 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009693951 Model... isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009698767 2020-12-11 13:57:18 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009698767 Robert A. Millikan isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009708543 2020-12-11 13:59:59 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009708543 Discovered... isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009708962 -The measurement of the negative charge of the electron, calculating it to be 1.6 x 10^-19 Coulombs 

]]> 2020-12-11 14:00:06 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009708962 How? isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009710677 -The oil drop experiment consisted in atomizing oil drops which passed through a charged plate and got ionized. In a second chamber gravity was manipulated and the droplets levitated, allowing microscopes to visualize the mass according to how fast or slow it fell.]]> 2020-12-11 14:00:34 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009710677 Proposed... isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009720114 -That the centre of the atom was made up by a heavy core of charged particles.

-He discovered the nucleus

-Also, he stated that the atom is mostly empyt space, and the nucleus is a positive center.
]]> 2020-12-11 14:03:12 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009720114 Model... isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009722252 Orbiting electrons around a nucleus of particles.]]> 2020-12-11 14:03:48 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009722252 What about his experiment? isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009722719 .By shooting alpha particles into a gold foil, it was expected that the rays would bounce back because of the solid positive charge, previously proposed by Thomson.  But, some of these passed through and others reflected in the centre proving that there was something in the core of the atom.]]> 2020-12-11 14:03:56 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009722719 Niels Bohr isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009725077 2020-12-11 14:04:36 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009725077 Proposed in his theory... isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009725422 -Proposed that electrons have a stable orbit, and the energy of these depend on the level where it's located.

-Bohr also suggested that radiation is a phenomenon occured when one electron jumps from a level to another.

-All atoms are unstable.

]]> 2020-12-11 14:04:41 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009725422 Model... isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009726246 2020-12-11 14:04:56 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009726246 Experiment isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009726466 No proper experiment was conducted, but the theory was based on with Rutherford´s past discoveries.]]> 2020-12-11 14:04:59 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009726466 Werner Heissenberg isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009730972 2020-12-11 14:06:10 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009730972 Formulated an equation isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009731772  -Formulated an equation, based on quantum mechanics, to explain spectrum intensities of the electron through matrix algebra and plancks constant. 

-Called the uncertainty principle, explains the position and the momentum of a particle.]]> 2020-12-11 14:06:23 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009731772 Erwin Schrodinger isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009769444 2020-12-11 14:16:09 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009769444 Applied math... isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009770060 -Formulated an equation that stated the basics of quantum mechanics, called the wave formula.
-Proposing that particles act like waves with a mathematical equation, describing the three dimensional wave function of a system.
]]> 2020-12-11 14:16:19 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009770060 Albert Einstein isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009794354 2020-12-11 14:22:23 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009794354 What did he contribute? isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009794815 -Einstein proved the existance of atoms through a new explanation of the quantum theory.

-He stated that light was composed by particles which energies relate with the frequencies stated by Plancks theory. Also discovering the photoelectric effect occurs because of a collision of photons and electrons.


]]> 2020-12-11 14:22:29 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009794815 isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009812421 Beyler, R. (2020, December 01). Werner Heisenberg. Retrieved December 11, 2020, from https://www.britannica.com/biography/Werner-Heisenberg

Ross, S. (n.d.). Atomic theory. Retrieved December 11, 2020, from https://www.britannica.com/biography/John-Dalton/Atomic-theory

Helmenstine, A., PhD. (n.d.). The History of Atomic Theory Led to Quantum Mechanics. Retrieved December 11, 2020, from https://www.thoughtco.com/history-of-atomic-theory-4129185





]]> 2020-12-11 14:26:51 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009812421 isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009868749 2020-12-11 14:40:18 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1009868749 How? isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1010624643 Democritus knew that if he cut a stone there would be a limit where it could no longer be divided.

]]> 2020-12-11 17:32:14 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1010624643 Wilhelm Roentgen isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1011189759 2020-12-11 19:47:47 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1011189759 What did he discover? isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1011192540 Roentgen discovered the x-ray by testing cathode rays through glass.
He covered the tubes with black paper, allowing the rays to create a fluorescent light. Therefore capturating this image...

]]> 2020-12-11 19:48:35 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1011192540 How did this collaborate to the atomic theory? isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1011204186 By using x-rays, microscopes are allowed to visualize objects such as crystals.This occurs since the light is defflected allowing scientists to visualize an arrangement of atoms in the crystal.

Called x-ray diffraction is a precise tool that has allowed many discoveries that contribute to the atomic structure.]]> 2020-12-11 19:52:14 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1011204186 Ernest Rutherford isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1011360845 2020-12-11 20:45:14 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1011360845 isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1011436874 Some NoS aspects presented in the following theories are:

-Studies based on others previously made.

-Refusing theories by proving them erroneous.

-Peer work and contribution

-Science as an indefinite proccess,  able to change throughout the years.

-Paradigm shifts

-Serendipity ]]> 2020-12-11 21:14:35 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1011436874 isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1011455411 2020-12-11 21:22:29 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1011455411 isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1011457314 2020-12-11 21:23:22 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1011457314 Experiment... isabellalopezne https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1011487482 Coloured light rays were beamed at a plate, which afterwards emitted electrons.]]> 2020-12-11 21:37:27 UTC https://padlet.com/isabellalopezne/xv588d93kh06wi27/wish/1011487482