-
Had the idea that everything is made of atoms, but Democritis added that the smallest particle can't be destroyed.
-
created the atomic theory that states that all matter is composed of particles called atoms, based on Democritus
-
Demcritus had the idea that you couldn't cut things infinitely, but it ended at an indestructible thing, which he named Atoms, later to be known as Atoms.
-
Thought that all materials on Earth were made of the four elements, earth, fire, water and air. He believed all substances were made of small amounts of these four elements.
-
Newton suggested that atoms are held together with attractions, otherwise known as forces. He also stated that "matter is formed of solid, massy impenetrable particles”.
-
Law of Multiple Proportions, proposed first Atomic Theory:
1- all matter is made up of tiny indivisible atoms
2- atoms of the same element are the same
3- atoms of different elements are different
4- atoms combine in whole number ratios to form compounds Creator of the "Dalton Atomic Model", or "Dalton's Model". -
Discovered electromagnetic induction.
-
Discovery of the element thallium and for his cathode-ray studies, fundamental in the development of atomic physics
-
Created the 63 element periodic table
-
Discovered electrons as the fundamental unit quantity of electricity.
-
Discovered and rays and protons.
-
Led to the discovery of electrons and invented the Plum Pudding Model and found protons in cathode ray tubes.
-
Discovered the Quantum Theory
-
Created the quasi-planetary model of the atom.
-
Discovered the Photoelectronic Effect
-
Rutherford conducted his "Gold Foil" experiment and created the Rutherford Atom model
-
Created Abegg's rule and the theory of freezing-point depression.
-
Moseley used equipment he made to prove that every element’s identity is determined by the number of protons it has.
-
Studied radiation until his wife died.
-
Discovered a large amount of isotopes.
-
Created the Bohrs Model.
-
Introduced the idea that all matter has wave forms.
-
Discovered x-rays after her husband, Pierre Curie, died.