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370
Aristotle
Denial of the existence of atoms -
400
Demcritus
Atoms are solid, homogeneous, indestructible and indivisible -
Antonie Lacosier
experiment being turing HgO into Hg+O. -
Joseph Proust
defined the law of definite proportions -
John Dalton
All atoms of a given element are identical, having the same size mass and chemical properties. atoms of a specific element are different from those of any other element. -
Amadeo Avagdro
equal volumes of gases at the same temperature and pressure contain equal numbers of molecules -
John Walker
invented the friction match -
Edwin Budding
invented the lawn mower -
William Crookes
invented the Cathode Ray -
Rotary Kiln
Rotary Kiln is invented by Frederick Ransome -
Tomas Edison
Thomas Edison invented the first working Phonograph -
JJ thomson
Identified the first subatomic particle-the electron -
Henri Becquerel
Discovered the X-RAY -
Max Planck
Matter can gain or lose energy only in small specific amounts called quanta -
Madame Curie
Nobel prize for research in radioactivity -
Albert Einstein
mass (m) and Kinetic energy (E) are equal, since the Speed of light(c2) is constant. -
Robert Millikan
determined the charge of an electron -
Ernest Rutherford
concluded that there was a tiny dense region which he called the nucleus -
Henery Moseley
discovered that atoms of each element contain a unique positive charge in their nuclei -
Tank
tank was invented by ernest Swinton -
James Chadwick
showed that the nucleus also contained another subatomic particle a neutral particle called the neutron -
Niels Bohr 1922
Developed an explanation of atomic structure that underlies regularities of the periodic table of elements -
Louis DeBroglie
Discovered that electrons had a dual nature-similar to both particles and waves -
Werner Heisenberg
Described atoms by means of formula connected to the frequencies of spectral lines -
Erwin Schrodinger
Viewed electrons as continuous clouds and introduced wave mechanics as a mathematical model of the atom -
FM
FM radio is patented by inventor Edwin H. Armstrong -
V-2
V-2 rocket worlds longest ballistic missile Developed in Nazi germany during world war 2 -
AMerica
America successfully developed the atomic bomb -
Japan
invented pocket calculator -
Magnavox odyssey
First video game for TV