-
Democritus is a ancient Greek pre-Socratic philosopher primarily known for the formulation of an atomic theory of the universe.
-
plato was also ancient Greek philosopher , Plato wrote dialogue, he tried writing his dialogue to a create fictional world for the purpose of telling a story
-
Aristotle was a Greek philosopher and discovered the theory that there are elements, which implied in his theory. And the contribution that caused to the emergence of the atomic theory
-
Robert discovered that the volume of a gas decreases with increasing pressure and vice versa.
-
Lavoisier discovered the role of oxygen plays in combustion, he helped construct the metric system, wrote the first extensive list of elements.
-
john dalton developed atomic theory upon modern physical science.
-
major findings: Daltons experiment on gases led to discovery that the total pressures of a mixture of gas amounted
name: john Dalton -
the solid sphere model was the first atomic model and was developed by john dalton, he hypothesized that an atom is a solid sphere that could not be divided into smaller pieces
-
he formulated the periodic law and created a farsighted version of the periodic table of elements, such as valence and atomic weight of uranium.
-
J.J Thomason created the electron in 1897 by the English physicist, he called the electrons corpuscles. They played a role in revolutionizing knowledge of atoms.
-
The two husband nd wife discovered two new elements, radium and polonium. Two radioactive elements. She found out that the properties of x-rays were able to kill tumors.
-
in 1909 Millikan began a series of experiments to determine electric charge carried by a single electron.
-
rutherford discovered the concept of radioactive half-life, the radioactive element radon, it differentiated and was named alpha and beta radiation.
-
Albert enabled the determination of Avogadro's number and therefore the size of molecules
-
he made fundamental contributions in understanding the structure of the atoms, and developing the early theory of quantum physics.
-
Henry Moseley was an outstanding skilled experimental physicist. He used self built equipment to prove that every elements identity is uniquely determined by the number of protons it has.
-
heisenberg was a german theoretical physicist and one of the key pioneers of quantum mechanics.
-
plum model is a scientific model of the atom. Created by J.J thomson. The model was to explain the two property of the atom
-
the electron cloud model was developed by erwin schrodinger.The model is a way to help visualize the most probable position of electrons in an atom
-
Solar System model illustrates the relative positions and motions of the planets and moons in the Solar System. Was created by nelis bohr
-
Based on theories and experiments on the Aristotelian assumption that the world and everything in it are composed of four basic elements, air, earth, fire, and water .
