The Atomic Structure
By Kimberly Alvarez and Kelly Mazariego
"by convention bitter, by convention sweet, but in reality atoms and void"
Democritus + Leucippus
Proposed a mechanical universe with small solid masses in motion
Proposed an atomic theory with spherical solid atoms based upon measurable properties of mass
Used a CRT to experimentally determine the charge to mass ratio of an electron
Studied "canal rays" and found they were associated with the proton H +
Studied radiations emitted from uranium and named them alpha and beta.He estimated atom size and concluded mass was concentrated in the nucleus.
used the idea of quanta (discrete units of energy) to explain hot glowing matter.
Published the famous equation E=mc 2
Developed an explanation of atomic structure that underlies regularities of the periodic table of elements. His atomic model had atoms built up of sucessive orbital shells of electrons.
Conducted the first controlled chain reaction releasing energy from the atoms nucleus.