-
300
Aristotle
A greek philosopher and scientist. Believed that everything was a combination of the four elements earth, fire,water,air. This theory was incomprehensible size everywhere called hyle -
400
Democritus
First person to suggest that materials were made up of smaller things. As he called them atomos. That everything is its own type of atomos as it doesn't matter what size it is -
1494
George Bauer
Found the first natural science upon observation as to speculation -
Robert Boyle
He studied glass and he proposed that elements are composed of corpuscles of various types and sizes are able to organize themselves into groups that represent different chemical substances. -
Antoine Lavoisier
He created the Law of Conservation -
Joseph Proust
Founded the Law of Definite Proportions. -
Amadeo Avogadro
He found out that equal volume of gas at the same temperature and pressure have same number of molecules. -
Joseph Gay-Lussac
He created the Law of combining volume of gas. -
John Dalton
Matter is composed of extremely small things.
Atoms are indivisible and indestructible.
Atoms of a given element are identical in size.
Atoms are of specific elements are different that those of other elements
In a chemical reaction atoms separate and combine or rearrange. -
J.J Thomas
Created the cathode ray. -
Henri Becquerel
First person to discover evidence of radioactivity. -
Ernest Rutherford
He found that this came out to be true.
An alpha particle (α=He^+2) is positive
A Beta particle (β=e-) is negative
A neutral particle (ϒ) is light -
Max Planck
Discovered the energy quanta. -
Niels Bohr
Discovered the structure of a Atom. -
Robert Millikan
The measurement the elementary electric charge. -
Louis de Broglie
The nature of electrons and found that all matter was properties. -
Werner Heisenberg
a key pioneer of quantum mechanics. -
Erwin Schrodinger
Developed a number of fundamental.
