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Formed a theory which believed that all metals were formed or compounded of sulfur and mercury. -
Created a theory which follows these rules:
1) Everything is made up of atoms, and they are physically invisible.
2) There is an empty space that exists between atoms.
3) Atoms cannot be destroyed.
4) Atoms are in perpetual motion and will remain to be so.
5) The number of atoms and their type is infinite, and they differ in shape and size. -
Introduced the atomic theory in which ideal geometric forms serve as atoms. -
Contributed to a theory which believed that all matter is composed of tiny particles. -
Created a theory which contained the following:
1) Matter is made up of small and invisible particles called atoms.
2) Atoms of the same element are identical and have the same mass.
3) Atoms of different elements can vary in size, mass, and chemical behavior.
2) Each chemical is composed of atoms of a single and unique type.
5) Atoms cannot be altered or destroyed by chemical means but can be combined to form more complex structures. -
Performed experiments which showed that the total mass of products and reactants in a chemical reaction is always the same. -
Created by John Dalton, a concept where an atom is a ball-like structure that cannot be divided any further. -
Proposed a law that states equal volumes of gases contain equal numbers of molecules and that elemental gases are composed of two atoms. -
Known for his discovery of the periodic law, which states that when elements are arranged in order of increasing atomic weight, the resulting table displays a recurring pattern of properties within groups of elements. -
First created by Joseph Larmor, but was claimed to be suggested by Jean Baptiste Perrin in 1911, and also had contributions from Niels Bohr in 1913. (Also known to be similar to the Rutherford Model) -
Hypothesized that radioactive particles cause atoms to break down and release radiation. -
Created the Plum Pudding Model. -
Created by J.J. Thomson, it is a representation of electrons surrounded by a sphere of positive charge, like negative-charged "plums" embedded in a positively-charged "pudding". -
Proved the existence of atoms. -
Discovered that the atom is mostly empty space surrounding a massive nucleus. -
His theory is a model of the atom that describes electrons as revolving in discrete orbits around a positively charged nucleus. -
Main contribution was deducing the electric charge of an electron. -
Demonstrated that the major properties of an element are determined by the atomic number not by the atomic weight. -
Created by Erwin Schrodinger, which shows that an atom consists of a small but massive nucleus which is surrounded by a cloud of rapidly moving electrons. -
Known for his discovery of the neutron, which states that the nucleus of an atom contains both positively charged protons and neutral neutrons, which have the same mass.