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Jan 1, 1417
ARISTOTLE ATOMIC MODEL
aristotle linkAristotle's theory was that matter was made of four elements: fire, water, earth, and air. He also believed that there were four qualities to these elements: dryness, hotness, coldness, and moistness. Based on these beliefs fire would hold the characteristics of being dry and hot, water is wet and cold, air is hot and wet, while the earth is dry and cold. That there were two forces: conflict and harmony. He beleived everything had a special purpose. -
JOHN DALTON ATOMIC THEORY
John beleived that elements could combined at atomic levels in fixed ratios. He also beleived this ratio would naturally differ in compounds due to the unique atomic weights of the elements being combined. He then stated he believed that atoms fell into their natural pattern. -
HANATARO NAGAOKA'S ATOMIC MODEL
His theory a very large nucleus and electrons circulating it. Nagaoka did no tests to test his theory, but it was later tested by Ernest Rutherford on December 11, 1950. -
James Clerk Maxwell
Proposed electric and magnetic fields filled the void or spaces in between atoms. -
J.J THOMPSON ATOMIC MODEL
His work put forward a new theory, that atom was made up of small particles. Thus he discovered the electrons. He proved his theory using the cathode ray tube, This bent and distored the light depending on whether h eused positive charges or negative charges. This further more proved Thompsons theory of the atomic model. -
ERNEST MARSDEN ATOMIC MODEL
Mardsen helped with Ernest Rutherford and finding the nucleus; in fact, Mardsen discovered the nucleus in the atom first; before Rutherford. -
ERNEST RUTHERFORD ATOMIC MODEL
By using his experement; the gold foil experement; to complete his theory that an atom is indeed has a positively charged center with negative charges surrounding the outside, except for of him calling the center of an atom "the center" he claimed it to be a nucleus. -
NEILS BOHR ATOMIC MODEL
Bohr's theory was that layers of negative and posive electrons surrounded a positve nucleus. He believed this was the only logical answer to explain why the atom was nuetral. -
WERNER HEISENBURG ATOMIC THEORY
Classical physics had always assumed that precise location and velocity of objects was always possible. Heisenberg, however discovered that this was not necessarily the case at the atomic level. In particular, he stated that the act of observation interfered with the location and velocity of small particles such as electrons. -
LOUIS DE BROGLIE ATOMIC THEORY
Beleived that atoms were not just compacted in strain, uniform composition. He proposed the theory that when given the ruight circumstances; the atomes srtucture could be wavy. -
ERWIN SCHRODINGER ATOMIC THEORY
Erwin Schrodinger took the ideas developed by de Broglie, Heisenberg and others and put them together in a single equation that is named after him. Solving this equation can in principle predict the properties and reactivities of all atoms and molecules. -
JAMES CHADWICK ATOMIC THEORY
He beleived that there were nuetrons placed stratigically around the atoms nuclei, By theorising this, he could explain the reason of an atom being nuetral. -
DEMOCRITIS ATOMIC MODEL
Democritus link 450 B.C-
Democritus claimed that everything is made up of atoms. That these atoms are physically, but not geometrically, indivisible; and that between atoms is an empty space. He also claimed atoms are indestructible. That they have always been, and always will be in motion; there are an infinite number of atoms and kinds of atoms, which are different in shape, and size. He said; ”The more any indivisible exceeds, the heavier it is.”.
