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Robert Boyle
he discovered the inverse relationship between volume and pressure of gas. he stated "all reality and change can be described in terms of elementary particles and their motion". in 1961 he wrote the first chemistry notebook -
Joseph priestly
he disproves that air was an indivisible element. he showed it was a combination of gasses when he isolated oxygen and discoverd 7 other gasses -
Antoine Lavoisier
he helped to develop the metric system in order to insure uniform weights and measures. while working as a tax collector -
John Dalton
he used his own data and the law of definite proportions he determined the relative masses of particles for 6 of the known elements hydrogen, oxygen, nitrogen, carbon, sulfur, and phosphorus -
Amedeo Avogadro
he was an Italian lawyer who began to study science and math. he expanded the work of Boyle and Charles and he clarified the difference between atoms and molecules -
Dmitri Mendeleev
he was a Russian chemist who was known for developing the first periodic table of elements. he listed the 63 elements and their properties on cards -
Henri becquerel
he discovered radiation. along with Pierre and Marie he showed certain elements emit energy at fixed rates -
Max Plank
he discovered that energy must be emitted in discrete units he called "quanta" and not in continuous waves -
Ernest Rutherford
he demonstrated that atoms consist of tiny dense positive charged regions surrounded by in large areas in space which still smaller, negative charged particles move -
Neil's Bohr
he discovered his atomic model solved this problem by using Planck's information. he hypothesized that electrons inhabit distinct energy levels and light is only emitted when an electricity "exited" electron is forced to change energy levels
