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460 BC - 370 BC in Abdera, Thrace, Greece

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Democritus discovered that everything was made out of atoms and that between every atom, there is always an empty space. He also discovered they are always in motion and that they are indestructible.

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Democritus discovered that everything was made out of atoms and that between every atom, there is always an empty space. He also discovered that they are always in motion and that they are indestructible.

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After his discoveries, he explained the atom structure by giving pictures of atoms in different shapes and sizes. He also used experimented. He took a material and divided it in half. Then, he would have a smaller but identical chunk. Therefore, he discovered that if you keep dividing a material, there would eventually be a point where it becomes the smallest it can be. That point is the atom.

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He explained the connections that atoms had using balls, sockets, hooks and eyes.

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He travelled as far as from India to Ethiopia

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He was 90 years old in 370 BC when he passed away. (The life expectancy at the time was 35 which is very impressive) He was at Abdera, Thrace, Greece.

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He was born in 26/08/1743 and later passed away on 08/05/1794 in Paris France.

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Antoine discovered that matter was composed of atoms. He also found out that atoms did not create or get destroyed during chemical reaction.

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He weighed the reactants and products of the chemical reaction to observe the changes in mass during combustion.  He found out that mass is conserved in chemical reaction.

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He gave oxygen and hydrogen it's names.

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He introduced the metric system.

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Antoine passed away at the age of 51 at Paris France on 1794.

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He was born in 05-06/09/1766 and later passed away in 27/07/1844 at Eaglesfield England.

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He discovered that compounds are combinations of two or more atoms. He also discovered that all atoms of a given element are identical in mass or properties.

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Unable to locate accurate proof of experiments.

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John Dalton was the first to describe colour blindness.

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Colour blindness is sometimes called “daltonism”

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John passed away on 27/07/1844 at Eaglesfield, England.

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J.J was born in 18/12/185 and later died in 30/8/1940 at Chetham Hill.

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J.J discovered the electron and passed a current through a tube with virtually no air. He placed positive and negatively charged plates at either end, and studied what was attracted to the plates.

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“The cathode ray appeared to be repelled by the negative plate and attracted by the positive plate. This meant that the ray was negatively charged and that it must consist of particles that have mass.” This was the explanation for his discovery of the atom.

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Thomson was knighted.

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He was the president of his knight’s organization.

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J.J passed away on 30/8/1940 at Cheetham Hill

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Max was born in April 23, 1858 and later died in October 4 1947 at Gottingen Germany.

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He discovered the quantum theory, which is the theory that revolutionized our understanding of atomic and subatomic processes. He also discovered that black bodies always radiated an amount of energy that was proportional to the frequency of the electromagnetic waves they absorbed.

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A black body, is a theoretical construct describing an object that absorbs all electromagnetic radiation falling onto it, leaving all wavelengths of light to be absorbed.

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He won a Nobel Prize

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He was one of the first supporters of Einstein.

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Max passed away on October 4 1947 at Germany.

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Marie was born on November 7 1867 at Poland

and died on July 4 1937.

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She discovered Radium and Polonium and later contributed to curing cancer.

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She investigated radium’s uses in treating infected cells using its radiation. By studying the properties of uranium ore, her studies contributed to the creation of the atomic bomb.

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She was the first woman to win a Nobel Prize.

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She refused to believe that she was damaging her health from being near radioactive substances to continue her research.

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She passed away on July 4 1937 at France.

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Robert was born on 22 March 1868 at Morrison Illinois

and later died on 19 December 1953.

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He discovered the elementary charge of an electron using the oil-drop experiment. He also discovered the electron.

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Small electrically charged drops of oil were dropped between two metal plates. By measuring the oil’s movements he determined how charged an electron was.

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He is best known for measuring the charge on the electron, for which he won the Nobel Prize in Physics in 1923.

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His achievements began when he first received a PhD from the physics department at Columbia University.

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He passed away in December 19 1953 at San Marino California.

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Ernest was born on 30 August 1871 and later died on 19 October 1937 at New Zealand.

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Ernest discovered that there are two types of radiation coming from uranium.

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He made a model to explain his discovery. His model explained that the negatively charged electrons surround the nucleus of an atom.

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His first name was accidentally spelt “Earnest” when it was first registered.

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He was the fourth child of 12 children.

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He passed away on October 19 1937 at Cambridge Cambridgeshire.

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Niels was born on October 7 1885 and later passed away in November 18 1962 in Copenhagen Denmark.

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Discovered that the atom was a positively charged nucleus surrounded by orbiting electrons.

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Bohr was working in England in 1913 when he developed this atomic model. He developed the model after studying the way glowing, hot hydrogen gives off light. When an incandescent light bulb is lit, it gives off all the different wavelengths of light.

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Niels Bohr was born and raised in Copenhagen.

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He received the Nobel Prize in physics for his work on atoms.

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Niels passed away in November 18 1962 at Copenhagen Denmark.

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Erwin was born on August 12 1887 at Vienna Austria and died on January 4 1961 at Vienna Austria.

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Erwin discovered a wave equation that calculated the energy levels of electrons in atoms.

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He used his equation to mathematically generate a model.

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He received the 1933 Nobel Prize for Physics with a British physicist, P.A.M. Dirac.

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He was invited to Ireland to help establish the Institute for Advanced Studies. He accepted, and was the director for the Institute's School of Theoretical Physics.

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He passed away on January 4 1961 Copenhagen Denmark.

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Chadwick was born on October 20 1891 at Manchester England and died later on July 24 1974.

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He discovered the neutron in 1932 and proved that they existed.

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He exposed elements to alpha particles and observed the results. An unknown radiation was released that didn’t have as much negative charge as electrons, so he named them neutrons

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He graduated from Manchester University's Honours School of Physics in 1911.

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Chadwick was elected Fellow of Gonville and Caius College (1921-1935) and became assistant director of research in the Cavendish Laboratory in 1923.

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Chadwick passed away on July 24 1974 at Cambridge England.

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Einstein was born on March 14 1897 at Belgium Germany

and later died on April 18 1955.

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In 1905, Einstein mathematically proved the existence of atoms. He also helped improve the Theory of Matter.

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Albert Einstein proved the existence of atoms by establishing equations showing and predicting the motion of particles in liquid.

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Einstein's brain was stolen after his death.

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The Prime Minister of Israel asked him to be the president of the country, but he declined.

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Einstein passed away on April 18, 1955 in New Jersey.

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Louis was born on August 15 1892 at Dieppe France

and later passed away on March 19 1987.

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In 1924 Louis de Broglie introduced the idea that particles, such as electrons, could be described not only as particles but also as waves.

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He explained that any moving particle, will be associated with a wave character.

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Louis Victor de Broglie was a renowned physicist and philosopher who made significant contributions to the field of science.

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Louis Victor de Broglie was a renowned French physicist and Nobel Prize winner who served as Perpetual Secretary of the French Academy of Sciences from 1960 to 1962.

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He passed away on March 19 1987 at France.

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Werner was born on December 5 1901 at Germany and passed away on February 1 1976 Munich, Germany.

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Werner discovered the uncertainty principle stating that a particle's postition and momentum cannot both be known exactly.

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I cannot find anything

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When he was a child, he played the piano.

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Aside from his Nobel Prize, some of Heisenberg’s awards include multiple honorary doctorates, the Order of Merit of Bavaria, and the Grand Cross for Federal Services with Star.

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He passed away on February 1 1976 in Munich, Germany.

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Duignan, Brian

“Democritus”

20/12/22

https://www.britannica.com/biography/Democritus

27/01/23
Unknown user

“UCSB ScienceLine”

09/01/16

http://scienceline.ucsb.edu/getkey.php?key=5525#:~:text=Democritus%20had%20a%20 thought%20experiment,element%20is%20the%22atom%22.

27/01/23

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Ayres, Alex

“Antoine Lavoiser: The Father of Modern Chemistry”

11/03/2022

https://study.com/learn/lesson/antoine-lavoisier-atomic-theory-model.html#:~:text=a%20chemical%20change.-,Antoine%20Lavoisier%20and%20Atomic%20Theory,or%20destroyed%20during%20chemical%20reactions.

27/01/23

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Ross, Sydney

“John Dalton”

23/07/2022

https://www.britannica.com/biography/John-Dalton

30/01/2022

Khan Academy

“Dalton’s Atomic Theory”

Unknown date of origin

https://www.khanacademy.org/science/chemistry/electronic-structure-of-atoms/history-of-atomic-structure/a/daltons-atomic-theory-version-2#:~:text=The%20first%20part%20of%20his,more%20different%20types%20of%20atoms.

30/01/2022

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Unknown

08/11/18

“3.13 Thomson’s Atomic Model”

https://flexbooks.ck12.org/cbook/ck-12-middle-school-physical-science-flexbook-2.0/section/3.13/primary/lesson/thomsons-atomic-model-ms-ps/

01/02/23

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Unknown author

“Max Planck - Biographical”

Unknown date of publishing

https://www.nobelprize.org/prizes/physics/1918/planck/facts/

05/02/23

Ferro, Shauncy

“17 little known facts about max planck”

22/08/17

https://www.mentalfloss.com/article/502908/17-little-known-facts-about-max-planck

05/02/23

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‘The editors of Encyclopedia Britannica’
“Marie Curie”
11/01/23

https://www.britannica.com/biography/Marie-Curie

04/02/23

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Unknown

“Robert A. Millikan”

Unable to locate date of creation

https://www.nobelprize.org/prizes/physics/1923/millikan/biographical/

04/02/23

# data[].attributes.body
Badash, Laurence

“Ernest Rutherford”

15/10/22

https://www.britannica.com/biography/Ernest-Rutherford

04/02/23

Unknown

“Who was Ernest Rutherford?”

Unable to locate date of creation

https://www.twinkl.com/teaching-wiki/ernest-rutherford

04/02/23

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Unknown

“Niels Bohr - facts”

Unable to locate date of creation

https://www.nobelprize.org/prizes/physics/1922/bohr/facts/

05/02/23

Fuchs, Marian

“Niels Bohr biography and achievements: when did neils bohr make his discovery?”

30/03/22

https://study.com/academy/lesson/neils-bohr-discovery-biography-quiz.html#:~:text=Niels%20Bohr%20also%20worked%20extensively,development%20of%20the%20atomic%20bomb.

05/02/23

‘Editor’

“10 things you might not know about neils bohr”

15/04/22

https://www.simplycharly.com/learn/facts/10-things-you-might-not-know-about-bohr/

05/02/23

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Unknown author

“Erwin Schrodinger - biographical”

Unknown date of publishing

https://www.nobelprize.org/prizes/physics/1933/schrodinger/biographical/

06/02/23

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Bowersox, Paul

“Albert Einstein and the most elemental atomic theory”

20/03/12

https://www.ans.org/news/article-969/albert-einstein-and-the-most-elemental-atomic-theory/#:~:text=Einstein%20also%20in%201905%20mathematically,use%20of%20statistics%20and%20probability.&text=Atomic%20theory%20says%20that%20any,always%20in%20random%2C%20ceaseless%20motion.

05/02/23
Walsh, Alison

“10 things you (probably) didnt know about einstein”

24/04/17

https://www.nationalgeographic.com/science/article/einstein-facts-science-genius

05/02/23

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Cline, Barbara

“Louis De Broglie”

11/08/22

https://www.britannica.com/biography/Louis-de-Broglie

06/02/23

# data[].attributes.body
Tretkoff, Ernier

“This month in physics history”

02/08

https://www.aps.org/publications/apsnews/200802/physicshistory.cfm#:~:text=Heisenberg%20conducted%20a%20thought%20experiment,momentum%20in%20an%20uncertain%20way.

06/02/23