Atomic Structure Timeline
Category: Other
Updated: 9 Oct 2018
busy work? yeah.
Contributors
Created byOlivia Barry
Attachments
Events
Democritus
develops theory that everything is made of atomsAristole
believes in 4 elements instead of atoms; adds
a fifth, aether.Berzelius
complied list of atomic weightsAvogadro
develops hypothesis later named after him about gasses and their proportionalityDalton
introduces atomic theoryMendeleev
creates periodic table of elementsThomson
showed how different volumes of gasses react
in different ways in his book Elements of
ChemistryBecquerel
is the first person to discover evidence of radioactivityCurie
discovers two new radioactive elements; coins
term "radioactivity"Lavoisier
develops oxygen theory of combustionRutherford
develops his model of an atom, with a nucleus full of mass with low-mass electrons surrounding itMoseley
performs experiment and finds atomic number closely correspond to the nucleus's electrical charge
atomic numberChadwick
discovers neutronMilikan
measures the elementary electric chargeBohr
discovers that electrons in the valence layer can transfer between atomsPlank
develops theory of quantum physics/energy quantaSchrödinger
helps develop the theory of quantum mechanics with his equationHeisenberg
gets Nobel Prize for "the creation of quantom mechanics"; matrix formulationMeitner
leads team of scientists to discover nuclear fission of uranium
Comments