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October 20, 1891- July 24, 1974

Physicist

Lived to be 83 years old

won 5 awards

In 1932, he proved that neutrons existed. It's elementary particles was lacking of any electrical charge.

In contrast with the helium nuclei (alpha rays) which are charged, and therefore repelled by the considerable electrical forces present in the nuclei of heavy atoms, this new tool in atomic disintegration need not overcome any electric barrier and is capable of penetrating and splitting the nuclei of even the heaviest elements. Chadwick in this way prepared the way towards the fission of uranium 235 and towards the creation of the atomic bomb. For this epoch-making discovery he was awarded the Hughes Medal of the Royal Society in 1932, and subsequently the Nobel Prize for Physics in 1935.

Chadwick has had many papers published on the topic of radioactivity and connected problems and, with Lord Rutherford and C. D. Ellis, he is co-author of the book Radiations from Radioactive substances (1930).

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August 12, 1887- January 4, 1961

Physicist

Lived to be 74 years old

won 3 awards

Known for...

Schrödinger equation

Schrödinger's cat

Schrödinger method

Rayleigh-Schrödinger perturbation Coherent states

Energy level

Qualia

Quantum biology

Quantum superposition

He handled with specific heats of solids, with problems of thermodynamics and atomic spectra.

His major discovery,  Schrödinger's wave equation, ended during the  first half of 1926.

His belief of the atomic spectra really should be set on some eigenvalue problem. He then won and shared this with Dirac the Nobel prize for 1933.

1955 he continued his research  and he published lot of papers on sort of topics.

He wrote a well-known book called "What is Life?" in 1944

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September 6, 1766- July 27, 1844

Chemist

Lived to be 78 years old

won a Royal medal

Known for...

the Atomic Theory

To Dalton's Theory, there are 2 laws, the law of conservation of mass and the law of constant composition. He planned that all matter is created out of very small particles that can't be separated (atoms). He or, well, his theory says that all atoms granted factors are much alike in mass and properties. It also combines two or more several kinds of atoms, and that a chemical reaction is reordering of the atoms.

Law of multiple proportions

Dalton's Law

Color blindness

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Year of discovery 1897

December 18, 1856 - August 30, 1940

Experimenting with a Cookes, or cathode ray, tube

Studies positively charged particle in neon gas

Accepted that the model didn’t account for negatively or positively charged particles

Negative - raisins in the pudding

Positive - dough of the pudding

Explain some electrical properties due to the electron, but failed to recognize the positive charges

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Nobel prize in physics in 1922

October 7, 1885 - November 18, 1962

Is a small, positively charged nucleus surrounded by orbiting electron

Electrons travel in separate orbits around the nucleus

Numbers of electrons in the outer orbit determines the properties of an element

Chemical element bohrium (Bh), No. 107 named after him

1913 - proposed to do a model of the atom

Electrons could only have certain classical motions: electrons in atoms orbit the nucleus

Bohr model was based upon Planck’s quantum theory of radiation

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August 30, 1871-October 19, 1937

Physicist

Lived to be 66 years old

won 11 awards

Discovered...

the Rutherford model

He tested J.J. Thomson's prediction by inventing his "gold foil" experiment. He thought that if Thomson's prediction works, then the mass of the atom scattered around in the atom. He tested it and most of the high velocity alpha particles (helium nuclei) went right through, while some bounced off the foil. This happened because most of the mass in the atom was focused in the nucleus, which makes some alpha particles bounce back.

atomic nucleus

Rutherford Scattering

Rutherford backscattering spectrometry

Proton

alpha particle

Artificial disintegration

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Rutherford's Planetary Model of the Atom. (n.d.). Retrieved February 15, 2017, from http://www.iun.edu/~cpanhd/C101webnotes/modern-atomic-theory/rutherford-model.html

Ernest Rutherford Biography. (n.d.). Retrieved February 15, 2017, from http://www.thefamouspeople.com/profiles/ernest-rutherford-140.php

Wyman, E. (2003-2017). Rutherford Model of the Atom: Definition & Diagram. Retrieved February 15, 2017, from http://study.com/academy/lesson/rutherford-model-of-the-atom-definition-diagram-quiz.html

Khan Academy. (2017). Dalton's atomic theory. Retrieved February 15, 2017, from https://www.khanacademy.org/science/chemistry/electronic-structure-of-atoms/history-of-atomic-structure/a/daltons-atomic-theory-version-2

Biography.com Editors. (2015, September 14). John Dalton Biography. Retrieved February 16, 2017, from http://www.biography.com/people/john-dalton-9265201#death-and-legacy

The Nobel Prize in Physics 1933. (n.d.). Erwin Schrödinger - Biographical. Retrieved February 17, 2017, from http://www.nobelprize.org/nobel_prizes/physics/laureates/1933/schrodinger-bio.html

(n.d.). Retrieved February 17, 2017, from http://abyss.uoregon.edu/~js/21st_century_science/lectures/lec14.html

The Nobel Prize in Physics 1935. (n.d.). James Chadwick - Biographical. Retrieved February 17, 2017, from http://www.nobelprize.org/nobel_prizes/physics/laureates/1935/chadwick-bio.html

Chadwick Atomic Theory. (n.d.). Retrieved February 17, 2017, from http://www.animationoptions.com/photobphi/chadwick-atomic-theory

Democritus
https://the-history-of-the-atom.wikispaces.com/Democritus
Democritus. (n.d.). Retrieved February 17, 2017, from https://the-history-of-the-atom.wikispaces.com/Democritus

Niels Bohr

http://www.livescience.com/32016-niels-bohr-atomic-theory.html

Palermo, E. (2013, May 14). Niels Bohr: Biography & Atomic Theory. Retrieved February 17, 2017, from http://www.livescience.com/32016-niels-bohr-atomic-theory.html

JJ Thomson
http://www.abcte.org/files/previews/chemistry/s1_p5.html
Development of the Atomic Theory. (n.d.). Retrieved February 17, 2017, from http://www.abcte.org/files/previews/chemistry/s1_p5.html

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▪ 4 60BC - 370BC

Live to be 90 years old

All matter consist of invisible particles called atoms

Idesturtble

Solid but invisible

Homogenous

Differ in size, shape, mass, position, & arrangement

Solids - small, pointy atoms

Liquids - large, round atoms

Oils- very fine, small atoms easily slip past each other

Mentor, Leucippus, originally came up with the atomic theory, but he adopted from him