-
100
Aristotle
He was influential in the rejection of the concept of the atom.
384 B.C -
460
Democritus
First person to propose the idea that mtter was not infinitely divisible.
460-370 -
Thomas Newcomen
Invented the atmospheric steam engine -
Antoine Lacosier
A French Chemist who, through, a conscious revolution, became the father of modern chemistry.
1743-1794 -
Joseph Proust
A french chemist who proved that the relative quantities of the elements that make up a chemical compound is constant
1754-1826 -
John Dalton
The atomic theory was a breakthrough in our understanding of matter.
1766-1844 -
Nicolas Joseph Cugnot
Invented the first automobile -
Amedeo Avagadro
He was an italian scientist. He is most noted for his contributions to molecular theory including what is known as Avogadro's Law.
1776-1856 -
Joseph Nivephore Niep
The first photographic image with a camera -
William Crooks
He was the inventor of the Crookes Radiometer.
1832-1919 -
Henri Becquerel
He was a French physicist, Nobel laureate, and the discoverer of radioactivity along with Marie Sklodowska- Curie and Pierre Curie, for which all three won the 1903 Nobel Prize in Physics.
1852-1903 -
J.J Thomson
He began a series of cathode ray tube experiments int he late 1890s to determine the ration of its charge to its mass.
1856-1940 -
Max Planck
Began searching for an explanation as he studied the light emitted from heated objects.
1853-1927 -
Madame Curie
Was a Polish and naturalized French physicist and chemist who conducted pioneering research on radioactivity.
1867-1934 -
Robert Millikan
He determined the charge of an electron.
1868-1953 -
Albert Einstein-
He was a German theoretical physicist who developed the general theory of relativity, one of the two pillars of modern physics.
1879-1955 -
Ernest Rutherford
Expected most of the fast-moving and relatively massive alpha particles to pass straight through the gold atoms.
1871-1937 -
Alexander Graham Bell
built the first telephone that transmitted electrically the human voice -
Sir Joseph Wilson Swan
Was the first person to invent a practical and longer-lasting electric lightbulb -
Paul Nipkow
Sent images over wires using a rotating metal disk technology with 18 lines -
Niels Bohr
Proposed a quantum model for the hydrogen atom that seemed to answer this question impressively, hohr's model also correctly predicted the frequencies of the lines in hydrogen's atomic emission spectrum
1885-1962 -
Henry Moseley-
Discovered that atoms of each element contain a unique positive charge in their nuclei
1887-1915 -
Erwin Schrodinger
Furthered the wave-particle theory proposed by de broglie
1887-1961 -
James Chadwick
Showed that the nucleus also contained another subatomic particle, a neutral particle called the neutron.
1891-1971 -
Louis DeBrogle
Proposed an idea that eventually accounted for the fixed energy levels of bohr's model
1892-1987 -
Werner Heisenberg
Was a German theoretical physicist and one of the key creators of quantum mechanics.
1901-1976 -
Alexander Fleming
Penicillin was discovered -
Konrad Zuse
Built the first freely programmable computer
