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490 BCE
Democritus
★ "Their speculation on atoms, taken from Leucippus, bears a passing and partial resemblance to the 19th-century understanding of atomic structure that has led some to regard Democritus as more of a scientist than other Greek philosophers; however, their ideas rested on very different bases."
★None of his writings survived, only small parts known from his body work.
★No one is positive of when he was born
Source:https://en.wikipedia.org/wiki/Democritus -
John Dalton
☁Dalton was an english chemist, physicist, meteorologist. But his most important searches have something to do with the atomic theory. “The first published indications of this idea are to be found at the end of his paper on the absorption of gases already mentioned, which was read on 21 October 1803, though not published until 1805”
Source:https://en.wikipedia.org/wiki/John_Dalton -
Maria Mitchell
✦Maria Mitchell discovered a new comet known as: “Miss Mitchell’s Comet” or “C/1847 T1”✦Francesco de vico discovered that same comet just three days after Mitchell, and reported it first, ended in maria's favor
✦Maria is relatively unknown today, her scientific discoveries may not seem “impressive enough” compared to other scientists in the world
Source: https://en.wikipedia.org/wiki/C/1847_T1
https://www.aps.org/publications/apsnews/200610/history.cfm -
JJ Thomos
๑Joseph Johnson Thomas was a physicist
๑ “In 1897, Thomson showed that cathode rays were composed of previously unknown negatively charged particles, which he calculated must have bodies much smaller than atoms and a very large value for their charger-to-mass-ratio.]Thus he is credited with the discovery and identification of the electron; and with the discovery of the first subatomic particle.” As well as being credited with finding first evidence of isotopes
Source: Wikipedia -
Ernest Rutherford
☢"He conducted research that led to the first "splitting" of the atom in 1917 in a nuclear reaction between nitrogen and alpha particles, in which he also discovered (and named) the proton.”
☢FUN FACT: The element rutherfordium was named after Ernest
☢ANOTHER FUN FACT: He was knighted in 1914 Source:https://en.wikipedia.org/wiki/Ernest_Rutherford http://ernestrutherfordpd7.weebly.com/interesting-facts.html -
Neils Bohr
♣"He was a Danish physicist who made foundational contributions to understanding atomic structure and quantum theory, for which he received the Nobel Prize in Physics in 1922. Bohr was also a philosopher and a promoter of scientific research.
♣ FACT: He helped refugees from nazism
Source:https://en.wikipedia.org/wiki/Niels_Bohr -
James Chadwick
ΩJames Chadwick discovered the neutron in 1931, which he later earned a nobel prize for in 1935
ΩFun fact: He was taught by Ernest Rutherford at ‘Victoria university of Manchester’.
Source: https://en.wikipedia.org/wiki/James_Chadwick -
Lise Meitner
♨ “Austrian physicist who worked on radioactivity and nuclear physics. Otto Hahn and Meitner led the small group of scientists who first discovered nuclear fission of uranium when it absorbed an extra neutron; the results were published in early 1939” ♨Lise was the first women to become a full professor of physics in Germany. She lost the positions in 1930’s because of anti-Jewish race laws of Nazi Germany Source: https://en.wikipedia.org/wiki/Lise_Meitner -
Louis de brogile
Louis de broglie
✗“French physicist who made groundbreaking contributions to quantum theory. In his 1924 PhD thesis he postulated the wave nature of electrons and suggested that all matter has wave properties. This concept is known as the de Broglie hypothesis, an example of wave-particle duality, and forms a central part of the theory of quantum mechanics.”
Source: https://en.wikipedia.org/wiki/Louis_de_Broglie -
Rosalind Franklin
☄“Rosalind Franklin was an english chemist as well as an x-ray crystallographer, she contributed to the understanding of molecular structure of DNA, RNA, viruses, coal and graphite”
☄Offered research position in 1942
☄“In 1953, after two years, owing to disagreement with her director John Randall and more so with her colleague Maurice williams, she was compelled to move to Birkbeck college.” Source: https://en.wikipedia.org/wiki/Rosalind_Franklin#/media/File:Rosalind_Franklin -
Grace hopper
ϟGrace hopper was one of the first programmers of the 'Harvard mark I' computer in 1944
ϟAt first Grace knew nothing about programming, and her job was to program the "Mark I"
ϟHopper received the first ever "man of the year" award.
Source https://en.wikipedia.org/wiki/Grace_Hopper
