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300
Aristotle
Aristotle came up with the method of gathering scientific facts, which proved as the basis for all scientific work -
400
Who Discovered The Atom
The discoverer of the atom was a man by the name of Democritus. He stated that all matter was made up of atoms. And that atoms are eternal and invisible. They also cant be divided. -
The Formula For Conservation Of Matter
n 1777, a man named Lavoisier, of France, provided that formula for conservation of matter. This formula told how to distinguish an element from a compound. -
The Coulomb's Law
In 1780's, a man named Couloumb formulated the Coulomb's law. This law states that force between two electrical charges is proportional to the poduct of the charges. In other words, Force is is equaled to the product of two charged atoms. -
John Dalton
John Dalton pictures atoms as indestructible particles with no internal structure. -
Crooke's Tube
In 1870, a man named Crookes invented a tube that produced cathode rays. This Demonstrated that cathode rays travel in straight lines. This proved that they produce phosphorescence. And when they strike certain materials they produce heat. -
xray
French physicist who while investigating fluorescence in uranium salts discovered radioactivity that is like x-rays but unlike x-rays could be deflected by a magnetic field so it must consist of charged particles also known as atoms. -
Ernest Rutherford
New Zealander states that and atom has a dense positively charged nucleus. -
Neils Bohr
He applies quantum theory to Rutherford's atomic structure by assuming that electrons travel in stationary orbits defined by their angular momentum. -
Louis de Broglie
He proposed that electrons could behave as waves under some conditions. -
Erwin Schrodinger
He determined how to find the probability for where the electron is in an atom. -
The Neutron.
Chadwick discovered the neutrally charged particle. It was named the Neutron -
Nuclear Fission
In Germany, a man named Otto hahn, discovered that by spliting the nucleus of an atom in to two nuclei it causes a Nuclear Fission -
USA
Glen T. Seaborg of USA, identified some elements that are heavier than uranium -
QUARKS
Murray Gell-Mann and George Zweig, brought forth an amazing discovery. They found little particles called Quarks. They said that they were little bits of matter. These little bits of matter were like building blocks for complex chemical substances.
