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460-370 BC. Greek Philosospher proposed the concept of the atom, believed matter was made up of individual particles called atoms.
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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
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Thomas Newcomen builds the first steam engine to pump water out of mines.[
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1766-1844 John Dalton created the development of the modern atomic theory.
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Compiled a list of elements known at the time, made a simple periodic table.
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Law of conservation of matter, in a chemical reaction matter is neither created nor destroyed.
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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
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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.
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In 1849, the Bourdon tube pressure gauge was patented by Eugene Bourdon.
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I couldn't find an exact year that William Crookes created this but, radiation from the cathode strikes light- chemicals which made the television.
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The first working phonograph was invented by Thomas Edison
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Wind turbines for grid electricity invented by Charles F. Brush in 1888.
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1856-1940 Started a series of cathode ray tube experiments to determine the ratio of its charge to its mass.
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1858-1947 studied the light emitted from heated objects, matter can gain or lose energy only in a small, specific amounts cakked quanta.
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Discovered radioactivity, won Noble prize
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conducted pioneering research on radioactivity. She was the first woman to win a Nobel Prize
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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.
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1871-1937 Won the Nobel Prize in chemistry, studied hown positively changed particles interact with solid material.
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1868-1953 Determined the charge of an electron, singole unit of negative charges.
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Made a quantum model for the hydrogen atom
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developed the general theory of relativity, one of the two pillars of modern physics
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1892-1987 Explained how electrons are arranged, fixed energy levels of Bohr's model.
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1901-1976 New atomic model, Wrote many papers
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1887-1961 Furthered the wave-particle theory, quantum mechanical model of the atom
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1891-1974 Showed that the nucleus also contained another substance, neutron.
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The ball-point pen was invented by Ladislo Biro in 1938. A patent battle erupted; learn how Parker and Bic won the war.
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Dee Horton and Lew Hewitt invented the sliding automatic door
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The Barbie doll was invented in 1959 by Ruth Handler .
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384-322 BC. Rejected the concept of the atom, didn't believe that empty space could exist.
