His hypothesis was that atoms can not Be destroyed, differ in size, shape, and temperature, are always moving and are invisible. He believed infinate number of atoms.
Elements are made of really small particles called atoms. Atoms of a given element are identical in size, mass and other properties.
Periodic law- he noticed patterns between elements and then graphed them and arranged by atomic weight.
Discovered electrical discharge tubes and discovered anode rays.
Showed that cathode rays were composed of negatively charged particles.
Published evidence supporting the existence of Radium
Isolated a sample of Radium
Proved that alpha radiation is helium nuclei.
Developed and published his model of atomic structure
Conducted the oil drop experiment that studied the charge of an atom.
Sent out the first X-ray machines for World War I
Generated a mathematical model for the distribution of electrons in an atom, known as wavelengths.