C atom e

Atomic History Timeline

Timeline created by hazeleyez1992 in Science and Technology
Event Date: Event Title: Event Description:
Hsaristo 27th Sep, 0330 Aristotle 384/322 BCE Considered the father of biology
Demo  atom model 27th Sep, 0460 Democritus -he came up with the idea of the atom and he called it the falling atom.
Elhuyar Joseph Louis Proust Formulated his law of definite proportions. Generalized that all compounds contain elements in certain definite proportions.
F96d9 john dalton7 John Dalton -He proposed the Atomic Theory in 1803 which stated that all matter was composed of small indivisible particles termed atoms, atoms of a given element possess unique characteristics and weight, and there are three types of atoms exist: simple (elements), compound (simple molecules), and complex (complex molecules).
Michael faraday Michael Faraday Discovered electromagnetic induction with atoms.
Becquerel Henri Becquerel In 1896 Henri Becquerel discovered the phenomenon of natural radioactivity. He then used his discovery of natural radioactivity and did an expierament using uranium salts.placed near the photographic plate covered with opaque paper, and it then fogged. This was concluded to be a property of the uranium atom.
Plum pudding model J.J. Thomson -an original study of cathode rays culminating in the discovery of the electron.
-he also stated that the atom looks like plum pudding, he invented the plum pudding model.
Planck Max Planck The energy for the resonator of frequency v is hv is a universal constant, now called planck's constant.
Marie curie color Marie Curie -Marie Curie was the founder of radioactive metals, examples are Radium and Polonium.
-She was honored in 1901.
Lens2177509 12216405671903 pcurie physik web Peirre Curie -He was the husband of marie curie, assistes her in the discovery of the radioactive metals.
-Peirre and Marie found that the harmful properties of x-rays were able to kill tumors.
Millikan postcard Robert Millikan His earliest major success was accurate determination of the charge carried by an electron. He demonstated the atomic structure of electricity.
Atom bohr Niels Bohr Niels Bohr explained how atoms, with electrons orbiting a central nucleus, ahchieve stability by assuming that their angular momentum is quantized.
Einstein postcard Albert Einstein Einstein dealt with classical problems of statistical mechanics and problems, these were then merged with the quantum threory. This led to the explanation of the browian movement of molecules.
Antoine lavoisier Antoine Lavoiser -He came up with the phlogiston theory which involved a weightless or nearly weightless substance known as phlogiston.
James chadwick James Chadwick -Chadwick made a fundamental discovery in the domain of nuclear science: he proved the existence of neutrons.
Ecam Ernest Rutherford -Assisted in helping chadwick made a fundamental discovery in the domain of nuclear science: he proved the existence of neutrons.
-Came up with the model of the electron cloud model