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Democritus: Concept of an atom
460-370 BC. Greek Philosospher proposed the concept of the atom, believed matter was made up of individual particles called atoms. -
Jan 9, 1439
Johanna Gutenburg: Printing press
Printing press in Mainz, Germany: The printing press was invented in the Holy Roman Empire by Johannes Gutenberg around 1440, based on existing screw presses. The first confirmed record of a press appeared in a 1439 lawsuit against Gutenberg -
Thomas Newcomen: Steam engine
Thomas Newcomen builds the first steam engine to pump water out of mines.[ -
John Dalton: Atomic Theory
1766-1844 John Dalton created the development of the modern atomic theory. -
Antonie Lavosier: Periodic Table
Compiled a list of elements known at the time, made a simple periodic table. -
Joseph Proust: Law of constant composition
Law of conservation of matter, in a chemical reaction matter is neither created nor destroyed. -
Amadeo Avagadro: Molecular Theory
contributions to molecular theory, including what is known as Avogadro's law. In tribute to him, the number of elementary entities (atoms, molecules, ions or other particles -
Asprin
scientists discovered that it was the compound called salicin in willow plants, which is responsible for pain relief. But it was father of modern medicine, Hippocrates, who first discovered the pain relieving properties of the willow plant in the 5th century, B.C. -
Tube Pressure Gauge
In 1849, the Bourdon tube pressure gauge was patented by Eugene Bourdon. -
William Crookes: Cathode Ray
I couldn't find an exact year that William Crookes created this but, radiation from the cathode strikes light- chemicals which made the television. -
Thomas Edison: Phonograph
The first working phonograph was invented by Thomas Edison -
Charles Brush: Wind Turbines
Wind turbines for grid electricity invented by Charles F. Brush in 1888. -
J.J. Thomson: Mass
1856-1940 Started a series of cathode ray tube experiments to determine the ratio of its charge to its mass. -
Max Planck: Quanta
1858-1947 studied the light emitted from heated objects, matter can gain or lose energy only in a small, specific amounts cakked quanta. -
Henri Becquerel: Radioactivity
Discovered radioactivity, won Noble prize -
Madame Curie: Radioactivity
conducted pioneering research on radioactivity. She was the first woman to win a Nobel Prize -
Henry Moseley: Atomic Number
1877-1915 Discovered that atoms of each element contain a positive charge in their nuclei., number of protons in an atom ideantify the atomic number. -
Ernest Rutherford: Atom
1871-1937 Won the Nobel Prize in chemistry, studied hown positively changed particles interact with solid material. -
Robert Milikan: Charge of an electron
1868-1953 Determined the charge of an electron, singole unit of negative charges. -
Niels Bohr: Model of the atom
Made a quantum model for the hydrogen atom -
Albert Einstein: Theory
developed the general theory of relativity, one of the two pillars of modern physics -
Louis deBroglie: New Model
1892-1987 Explained how electrons are arranged, fixed energy levels of Bohr's model. -
Werner Heisenberg: Model
1901-1976 New atomic model, Wrote many papers -
Erwin Schrodinger: Quantum mechanical model of the atom
1887-1961 Furthered the wave-particle theory, quantum mechanical model of the atom -
James Chadwick: Neutron
1891-1974 Showed that the nucleus also contained another substance, neutron. -
Ladislo Biro: Ball-point pen
The ball-point pen was invented by Ladislo Biro in 1938. A patent battle erupted; learn how Parker and Bic won the war. -
Dee Horton: Sliding door
Dee Horton and Lew Hewitt invented the sliding automatic door -
Barbie Doll: Ruth Handler
The Barbie doll was invented in 1959 by Ruth Handler . -
Aristotle: Rejected the atomic theory
384-322 BC. Rejected the concept of the atom, didn't believe that empty space could exist.
