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Plato founded the Academy, an academic program which many consider to be the first Western university. Plato also wrote many philosophical texts. -
Democritus was a central figure in the development of the atomic theory of the universe. He thought that all material bodies are made up of singular small atoms. -
Greek philosopher and scientist who wrote about virtually every area of knowledge, including most of the sciences. -
the person who discovered that the volume of a gas decreases with increasing pressure and vice versa which is called the famous Boyle's law. -
Alchemists made all sorts of materials for commerce, including medicines, pigments, metallic alloys, perfumes and cosmetics. -
John Dalton formulated a new atomic theory to explain chemical reactions, upon which much of modern chemistry and physics is based. -
When elements are arranged in order of increasing atomic mass. It is only true for elements up to calcium. gives a basis for the classification of an element having similar properties into groups of elements. -
Mendeleev's original periodic table claimed the famous periodic law that “Element properties are a periodic function of their atomic weight.” -
Photoelectric effect is where electrically charged particles are released from or within a material when it absorbs electromagnetic radiation. -
The radioactivity of uranium was discovered by Henri Becquerel who, starting from a wrong idea, progressively realized what he was observing and announced it. -
According to Planck's quantum theory, Different atoms and molecules can emit or absorb energy in discrete quantities only. -
Robert Millikan is known for discovering value of the elementary charge, which is the charge on a single electron. -
Ernest Rutherford studied the absorption of radioactivity by thin sheets of metal foil and found two components: alpha radiation, which is absorbed by a few thousandths of a centimeter of metal foil, and beta radiation, which can pass through 100 times as much foil before it was absorbed. -
The model was proposed by Niels Bohr. It is when electrons travel around the nucleus of an atom in distinct circular orbits, or shells. -
Moseley believed that the atomic number is the number of positive charges in the atomic nucleus. this fundamental discovery concerning atomic numbers was a milestone in advancing the knowledge of the atom. -
Ernest Rutherford discovered the proton; he proved that the nucleus of the hydrogen atom is present in the nuclei of all other atoms.. -
The Schrodinger equation gives a detailed account of the form of the wave functions or probability waves that control the motion of some smaller particles. -
Heisenberg Uncertainly Principle is the more accurately one property is measured, the less accurately the other property can be known. -
the physicist James Chadwick conducted an experiment in which he put Beryllium with alpha particles from the natural radioactive decay of Polonium which is how neutrons were discovered. -
It is a historical model of atom. The plum pudding model has electrons surrounded by a volume of positive charge, like negatively charged "plums" embedded in a positively charged "pudding".