-
Antoine Lavoisier
stated that the total mass in a reaction remains the same -
Joseph Proust
Specific substances allways had the same ratio by mass -
J.l Gay-lussac
under constant conditions the volumes of reacting gases and gaseous products are in the ratio of small numbers -
John Dalton's
His theroy
-All matter is made of atoms. Atoms are not breakable
-All atoms of a given element are identical
-Compounds are formed by a combination of two or more different kinds of atoms.
- A chemical reaction is a rearrangement of atoms. -
Amedeo Avogadro
proposed that equal volumes of two diffrent gasses at equal temperature and pressure will have the same number of particles. -
Robert Brown
Robert Brown discovered the Brownian motion by looking at dust grains floating in water through a microscope -
Johann Josef Loschmidt
Johann Josef Loschmidt discovered the size of the atoms in the air -
Dmitri Mendeleev
He published the first periodic table. -
J. Desaulx
Said the brownian motion was caused by the thermal motion of water molecules -
J. J. Thomson
J. J. Tomson discovered that cathode rays were made of electrons and he figured the ratio of an electrons charge to its mass -
Sir Ernest Rutherford
Sir Rutherford bombarded a sheet of gold with alpha rays and found that a small amount of these beams were deflected and he sermized that the atom was mostly made up of empty space -
Robert Millikan
obtained accurate measure of an elecrton's charge -
Frederick Soddy
discovered that there were more than one type of atom at each position on the periodic table. -
Niels Bohr
the electrons were confined into orbits, and could jump between these orbits but not without absorbing energy -
Walter Blothe
He found that there were high energy particles with no charge and they had relativly the same mass as the protron
